![](../../pictures/archives/compress/1999/108/jpeg/24t.jpg) Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/21t.jpg) Limestone rocks, view from Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/00t.jpg) View of canyon walls at evening from Sheltowee Trail near Chimney Top Rock. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/17t.jpg) Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/18t.jpg) Bottom of a canyon, view from Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/03t.jpg) Bamboo brushes on the bottom of a canyon near Sheltowee Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/02t.jpg) Erosion of a limestone rock at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/01t.jpg) Erosion forms of limestone in a rock shelter at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/24t.jpg) Erosion forms of limestone on a rock shelter at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/03t.jpg) Tree roots and erosion forms on a limestone rock at Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/11t.jpg) View of rock shelters from the top of Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/18t.jpg) Gray s Arch, view from rock shelters. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/17t.jpg) Gray s Arch, view from rock shelters. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/12t.jpg) Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/13t.jpg) A.S. on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/16t.jpg) A.S. on Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/23t.jpg) View from Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/15t.jpg) Forest near Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/21t.jpg) View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/10t.jpg) A small maple on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/12t.jpg) Pine forest on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/13t.jpg) Flowers on a stone at Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/17t.jpg) View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/20t.jpg) View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/16t.jpg) A tree with very big leaves on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/00t.jpg) Rough Trail to Gray s Arch. Red River Gorge, Kentucky, November 5, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/000t.jpg) Rough Trail to Gray s Arch. Red River Gorge, Kentucky, November 5, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/19t.jpg) View from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/18t.jpg) Oak forest near Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/14t.jpg) Mushrooms in moss at Buck Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/12t.jpg) Blueberry and rhododendron bushes on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/22t.jpg) View of a canyon from Pinch Em Tight Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/07t.jpg) Multicolor maple leaves on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/04t.jpg) Unknown dwarf berries on Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/108/jpeg/08t.jpg) Rhododendron in a canyon, view from Rough Trail. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/07t.jpg) Limestone erosion forms at Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/08t.jpg) Mushroom-like limestone erosion forms at Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/109/jpeg/09t.jpg) Creeping fern among dry leaves and needles on Koomer Ridge Trail. Red River Gorge, Kentucky, November 7, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/20t.jpg) Forest below Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/22t.jpg) Gray s Arch with rhododendron on foreground. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/04t.jpg) Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/06t.jpg) Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/08t.jpg) Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/09t.jpg) View from the top of Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/10t.jpg) View from the top of Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/07t.jpg) Forest near Gray s Arch at morning. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/19t.jpg) Rhododendron, fir and maples near Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/107/jpeg/15t.jpg) Erosion of limestone near Gray s Arch. Red River Gorge, Kentucky, November 6, 1999.
![](../../pictures/archives/compress/1999/106/jpeg/23t.jpg) Tobacco farm near Slade, Kentucky, November 5, 1999.
![](../../pictures/archives/compress/1999/110/jpeg/03t.jpg) View of Wabash River from a trail to Fort Ouiatenon. Indiana, November 13, 1999
![](../../pictures/archives/compress/2004/424/jpeg/09t.jpg) Early snowfall on Rock Street near Museum of Fall River Historical Society in historic Highlands District. Fall River, Massachusetts, November 13, 2004
![](../../pictures/archives/compress/1999/80/jpeg/17t.jpg) Museum of S. I. Vavilov State Optical Institute with an old artistically decorated chimney and a Soviet-era exposition. (the room has reach interior because the building was expropriated from a wealthy family after the Great October Socialist Revolution). Vasilyevsky Island, Saint Petersburg, Russia, April 14, 1999.
![](../../pictures/archives/compress/2004/423/jpeg/26t.jpg) Rock Street in historic Highlands District. Fall River, Massachusetts, November 13, 2004
![](../../pictures/archives/compress/2003/355/jpeg/14t.jpg) A rock in the middle of Bell Rock Road in Freetown - Fall River State Forest. Massachusetts, August 24, 2003
![](../../pictures/archives/compress/1999/90/jpeg/13t.jpg) Potholes Park, Fall Creek Gorge. The trip was organized by Purdue University International Center. Near Pine Village, Indiana, June 5, 1999.
![](../../pictures/archives/compress/1999/80/jpeg/15t.jpg) Museum of S. I. Vavilov State Optical Institute with an old artistically decorated chimney and a Soviet-era exposition. The museum was settled in a former typewriting office (the room has reach interior because the building was expropriated from a wealthy family after the Great October Socialist Revolution). Vasilyevsky Island, Saint Petersburg, Russia, April 14, 1999.
![](../../pictures/archives/compress/2003/366/jpeg/23t.jpg) A dam in Russells Mills village, on Paskamansett River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 28, 2003
![](../../pictures/archives/compress/2004/425/jpeg/21t.jpg) A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 25, 2004
![](../../pictures/archives/compress/2003/366/jpeg/22t.jpg) A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 28, 2003
![](../../pictures/archives/compress/2003/366/jpeg/10t.jpg) A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 23, 2003
![](../../pictures/archives/compress/2003/365/jpeg/10t.jpg) A dam in Russells Mills village, on Paskamansett/Slocums River, view from Rock O Dundee Road. Dartmouth, Massachusetts, November 13, 2003
![](../../pictures/archives/compress/1999/90/jpeg/16t.jpg) Overcoming a tub in a creek in Potholes Park (Fall Creek Gorge) by an international student of Purdue University. Near Pine Village, Indiana, June 5, 1999.
![](../../pictures/archives/compress/1999/90/jpeg/14t.jpg) Inspecting a creek in Potholes Park (Fall Creek Gorge) by international students of Purdue University. Near Pine Village, Indiana, June 5, 1999.
![](../../pictures/archives/compress/2005/473/jpeg/09t.jpg) Forest of Enfield gorge, from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
![](../../pictures/archives/compress/1999/90/jpeg/18t.jpg) International students of Purdue University walking over rapids and tubs of a creek in Potholes Park (Fall Creek Gorge) near Pine Village. Indiana, June 5, 1999.
![](../../pictures/archives/compress/2005/476/jpeg/21t.jpg) Fallen sycamore tree in snow near Gorge Trail in Taughannock Falls State Park. New York, November 23, 2005
![](../../pictures/archives/compress/2005/473/jpeg/08t.jpg) Fall colors of Enfield gorge, view from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
![](../../pictures/archives/compress/2001/170/jpeg/31t.jpg) Entrance to Nahal Tseelim River Gorge, 2 miles north from Masada. The Middle East, January 20, 2001
![](../../pictures/archives/compress/2005/473/jpeg/11t.jpg) Fall colors of Enfield gorge, zoomed, view from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
![](../../pictures/archives/compress/1999/97/jpeg/19t.jpg) Drying forest at Heritage Trail along Wabash River north from Lafayette. Indiana, September 11, 1999.
![](../../pictures/archives/compress/2003/338/jpeg/11t.jpg) From a trail near Hogs Rock in Freetown/Fall River State Forest. Massachusetts, April 20, 2003.
![](../../pictures/archives/compress/1999/106/jpeg/09t.jpg) A trail along Wabash River at Ross Hills Park 5 miles west from Lafayette. Indiana, October 30, 1999.
![](../../pictures/archives/compress/2003/342/jpeg/15t.jpg) A trail between Hog s Rock and Doctor s Mill Pond in Freetown/Fall River State Forest. Massachusetts, May 24, 2003
![](../../pictures/archives/compress/2003/342/jpeg/16t.jpg) A trail between Hog s Rock and Doctor s Mill Pond in Freetown/Fall River State Forest. Massachusetts, May 24, 2003
![](../../pictures/archives/compress/1999/110/jpeg/11t.jpg) Wabash Street Bridge across Chicago River. Sun-Times Daily News, Wrigley and Equitable Buildings are behind the bridge. Chicago, November 22, 1999
![](../../pictures/archives/compress/2001/170/jpeg/29t.jpg) Entrance to Nahal Tseelim River Gorge from Dead Sea, 2 miles north from Masada, view from a parking place. The Middle East, January 20, 2001
![](../../pictures/archives/compress/2001/170/jpeg/30t.jpg) A.S. at entrance to Nahal Tseelim River Gorge from Dead Sea, 2 miles north from Masada, view from a parking place. The Middle East, January 20, 2001
![](../../pictures/archives/compress/2005/433/jpeg/15t.jpg) A garden of Fall River Historical Society during blizzard, view from Rock Street. Fall River, Massachusetts, January 23, 2005.
![](../../pictures/archives/compress/2003/342/jpeg/17t.jpg) Fiddleheads on a trail between Hog s Rock and Doctor s Mill Pond in Freetown/Fall River State Forest. Massachusetts, May 24, 2003
![](../../pictures/archives/compress/2019/2435/jpeg/26t.jpg) Peppered rock-shield lichen (Xanthoparmelia conspersa) on a rock at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
![](../../pictures/archives/compress/2019/2570/jpeg/04t.jpg) Crayfish (crawfish) mud chimney on Winters Bayou Trail in Sam Houston National Forest. Cleveland, Texas, September 28, 2019
![](../../pictures/archives/compress/2019/2435/jpeg/27t.jpg) Apothecia of peppered rock-shield lichen (Xanthoparmelia conspersa) on a rock at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
![](../../pictures/archives/compress/2020/2688/jpeg/05t.jpg) Crayfish (crawfish) mud chimney on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 18, 2020
![](../../pictures/archives/compress/1999/103/jpeg/01t.jpg) Kathy Trail along Missouri River near Columbia, Missouri. October 23, 1999.
![](../../pictures/archives/compress/1999/103/jpeg/04t.jpg) Kathy Trail along Missouri River near Columbia, Missouri. October 23, 1999.
![](../../pictures/archives/compress/1999/102/jpeg/24t.jpg) Rocks along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
![](../../pictures/archives/compress/1999/102/jpeg/25t.jpg) Rocks and bushes along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
![](../../pictures/archives/compress/1999/103/jpeg/02t.jpg) Bushes on rocks along Missouri River, view from Kathy Trail near Columbia, Missouri. October 23, 1999.
![](../../pictures/archives/compress/2005/476/jpeg/23t.jpg) A wall of the gorge in Taughannock Falls State Park. New York, November 23, 2005
![](../../pictures/archives/compress/1999/110/jpeg/12t.jpg) State Street Bridge across Chicago River. City Garage (?) and Blue Cross - Blue Shield Building are behind the bridge. Chicago, November 22, 1999
![](../../pictures/archives/compress/2018/2238/jpeg/01t.jpg) Crayfish (crawfish) mud chimney on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, March 24, 2018
![](../../pictures/archives/compress/2019/2435/jpeg/29t.jpg) Peppered rock-shield lichen (Xanthoparmelia conspersa) and sunken rim-lichen (Lecanora oreinoides) on a rock at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, January 25, 2019
![](../../pictures/archives/compress/2018/2238/jpeg/24t.jpg) Mud chimney borrowed by crayfish (crawfish) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, March 24, 2018
![](../../pictures/archives/compress/2005/473/jpeg/07t.jpg) Cliffs of Enfield gorge in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
![](../../pictures/archives/compress/2007/601/jpeg/26t.jpg) Pedestal rock (differential weathering) near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
![](../../pictures/archives/compress/1999/98/jpeg/12t.jpg) Tippecanoe River (after a drought) north from Lafayette, Indiana. September 18, 1999.
![](../../pictures/archives/compress/2018/2418/jpeg/09t.jpg) Echo Canyon and Little Rock from a slope of Enchanted Rock in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
![](../../pictures/archives/compress/2018/2418/jpeg/08t.jpg) Little Rock from a slope of Enchanted Rock in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
![](../../pictures/archives/compress/2007/604/jpeg/06t.jpg) Boot Rock, view from Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
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