 Waterfall of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Waterfall and a pond of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Pretty sneezeweed (Helenium elegans) with down-flexed ray flowers near Lampasas River in Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, May 17, 2009
 Steel cable suspension bridge downstream from the falls in Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Tributary of Lampasas River near the entrance of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Limestone cave with a spring of a tributary of Lampasas River near the entrance of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 River bed of a tributary of Lampasas River near the entrance of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Old suspension bridge over a tributary of Lampasas River at the head of Stillhouse Hollow Nature Trail in Chalk Ridge Falls Park. Belton - Killeen, Texas, August 17, 2008
 A spring with maiden ferns of a small creek in Chalk Ridge Falls Park. Belton - Killeen, Texas, May 17, 2009
 Upper waterfall of Buttermilk Falls State Park. Ithaca, New York, November 15, 2005
 Small waterfall in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Side waterfall in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Small waterfall in Pedernales Falls State Park. Johnson City, Texas, January 12, 2013
 A waterfall in Buttermilk Falls State Park, near upper entrance. Ithaca, New York, October 23, 2005
 Hollow part of a cypress tree in Pedernales Falls State Park. Johnson City, Texas, January 12, 2013
 Twin falls in Pedernales Falls State Park, from an overlook. Johnson City, Texas, November 7, 2009
 Hollow part of a cypress tree at sunset in Pedernales Falls State Park. Johnson City, Texas, January 12, 2013
 Dark Hollow Falls near Skyline Drive. The Meadow, Virginia, May 16, 2007
 A waterfall near Blue Ridge Parkway, near Mile 80. Peaks of Otter, Virginia, May 17, 2007
 Givat Rehavam hill cone made of chalk and marl, view from a ridge along Gishron cliffs (trail 20564) 3 miles west from Eilat. The Middle East, January 17, 2002
 Givat Rehavam hill cone made of chalk and marl, view from a ridge along Gishron cliffs (trail 20564) 3 miles west from Eilat. The Middle East, October 17, 2002
 Givat Rehavam hill cone made of chalk and marl, view from a ridge along Gishron cliffs (trail 20564) 3 miles west from Eilat. The Middle East, October 17, 2002
 Givat Rehavam hill cone made of chalk and marl, view from a ridge along Gishron cliffs (trail 20564) 3 miles west from Eilat. The Middle East, October 17, 2002
 Lake below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 A waterfall near Old Lodging Railroad at Upper Otter Creek Overlook at mile 35 of Blue Ridge Parkway. Buena Vista, Virginia, May 17, 2007
 Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Oak forest on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Chatfield Hollow Brook and a covered bridge in Chatfield Hollow State Park. Killingworth, Connecticut, June 6, 2004
 Chatfield Hollow Brook, view from a covered bridge in Chatfield Hollow State Park. Killingworth, Connecticut, June 6, 2004
 Bark of an oak tree on Hoots Hollow Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Waterfall in Sablino, south from Saint Petersburg. Russia, June 13, 2009
 Artificial waterfall in Zilker Botanical Gardens, Austin, Texas, March 7, 2009
 Waterfall in Japanese garden in Zilker Botanical Gardens, Austin, Texas, March 7, 2009
 Twin artificial waterfall in Zilker Botanical Gardens, Austin, Texas, March 7, 2009
 Falls near Old Lodging Railroad at Upper Otter Creek Overlook at mile 35 of Blue Ridge Parkway. Buena Vista, Virginia, May 17, 2007
 Buffalo bur (Solanum rostratum) in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Blooming cherry like tree in McKinney Falls State Park. Austin, Texas, March 7, 2009
 Angels Showers waterfall in a cave of Ozark Caverns in Lake of the Ozarks State Park. Missouri, September 10, 2005
 River below Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 7, 2009
 Cypress below Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 7, 2009
 Water speedwell (Veronica anagalis-aquatica) in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Blue curls (Fiddleneck, Phacelia congesta) in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Creek and a cypress in McKinney Falls State Park, near Upper falls. Austin, Texas, October 26, 2008
 Cypress Pool below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Narrowed stream below the falls in Pedernales Falls State Park. Johnson City, Texas, January 12, 2013
 Limestone rocks near the falls in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Lower Falls in Taughannock Falls State Park. Ithaca, New York, October 11, 2005
 Galls (hollow blisters) on leaves of common ragweed (Ambrosia artemisiifolia) at Lake Somerville Trailway near Birch Creek Unit of Somerville Lake State Park. Texas, July 30, 2021
 Mature seed head of curly dock (Rumex) in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Flowers of Blue curls (Fiddleneck, Phacelia congesta) in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Green false nightshade (Chamaesaracha coronopus) near a parking lot in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Cypress needles below Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 7, 2009
 Cypresses and rocks below Beach Area in Pedernales Falls State Park. Johnson City, Texas, November 7, 2009
 Rice stink bug nymph (Oebalus pugnax) on bluestem grass in McKinney Falls State Park near Austin. Texas, May 10, 2009
 Indian mallow (Abutilon fruticosa) near a parking of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
 A mushroom with brown spores near Coakley Hollow Trail in Lake of the Ozarks State Park. Missouri, September 10, 2005
 Under Gorman Falls in Colorado Bend State Park. Bend, Texas, May 23, 2009
 Gorman Falls in Colorado Bend State Park. Bend, Texas, May 23, 2009
 A waterfall of a dam of Punch Bowl Lake on Glen Creek in Watkins Glen State Park. New York, November 19, 2005
 Gorman Falls (view from a trail) in Colorado Bend State Park. Bend, Texas, May 23, 2009
 Mossy travertine formations at the base of Gorman Falls in Colorado Bend State Park. Bend, Texas, May 23, 2009
 Texas aster with variegated fritillary(?) butterfly near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
 Ponds of Pedernales Falls. Johnson City, Texas, November 7, 2009
 Cypress roots below Pedernales Falls. Johnson City, Texas, November 7, 2009
 Cypress pool below Pedernales Falls. Johnson City, Texas, November 7, 2009
 Water stream near Pedernales Falls. Johnson City, Texas, November 7, 2009
 Cypress pool below Pedernales Falls. Johnson City, Texas, November 7, 2009
 Dwarf yellow butterfly (Dainty Sulphur, Nathalis iole) on Texas aster near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
 Cypress roots between stones below Pedernales Falls. Johnson City, Texas, November 7, 2009
 A waterfall of the creek going fron Sunfish Lake, near Woodcock Bar campground. Delaware Water Gap, New Jersey, April 14, 2007
 Texas aster (Aster texanus) near a pond of Upper falls in McKinney Falls State Park. Austin, Texas, October 26, 2008
 Shequaga Falls in village of Montour Falls. New York, November 1, 2005
 Ant Sarah Falls in village of Montour Falls. New York, November 3, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook. New York, October 8, 2005
 Frozen Taughannock Falls near Ithaca, view from upper falls overlook. New York, December 10, 2005
 First snow at Taughannock Falls near Ithaca, view from upper falls overlook. New York, November 23, 2005
 Taughannock Falls, view from upper falls overlook at rain. Ithaca, New York, November 9, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook, at light snowfall. New York, November 23, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook, at cold morning. New York, November 24, 2005
 1921 Rock Falls eight-column carved-panel motorized hearse in National Museum of Funeral History. Houston, Texas, February 8, 2009
 Turkey tail mushrooms near Lake Treman in Buttermilk Falls State Park. Ithaca, New York, October 13, 2005
 - Turner Falls and a festival in Davis OK 6/28/97 (Turner Falls - a trip to Colorado Mountains, June 28 - July 5, 1997)
 - Turner Falls and a festival in Davis OK 6/28/97 (Turner Falls - a trip to Colorado Mountains, June 28 - July 5, 1997)
 - Turner Falls and a festival in Davis OK 6/28/97 (Turner Falls - a trip to Colorado Mountains, June 28 - July 5, 1997)
 - Turner Falls and a festival in Davis OK 6/28/97 (Turner Falls - a trip to Colorado Mountains, June 28 - July 5, 1997)
 - Turner Falls and a festival in Davis OK 6/28/97 (Turner Falls - a trip to Colorado Mountains, June 28 - July 5, 1997)
 A waterfall under the dam in Fillmore Glen State Park. Moravia, New York, October 9, 2005
 A small lake near High Ridge trail in Rock Bridge State Park. Columbia, Missouri, September 24, 2005
 A waterfall of central cascade in Watkins Glen State Park. New York, October 13, 2005
 A waterfall of Cavern Cascade in Watkins Glen State Park. New York, October 9, 2005
 Happy Hollow Park. West Lafayette, Indiana, May 5, 1999.
 Sewage waterfall in Old Sylvia in Pavlovsk Park, south from Saint Petersburg, Russia, June 23, 2010
 Martsa waterfall in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Chalk cliffs behind Yeroham reservoir. The Middle East, March 8, 2001
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park. West Lafayette, Indiana, October 21, 1999.
 Happy Hollow Park in West Lafayette, Indiana, September 22, 1999.
 Happy Hollow Park in West Lafayette, Indiana, October 10, 1999.
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