"Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
Passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Limestone tunnel in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Limestone formations in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Flowstone feature in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
A column and other speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Narrow passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Pointed formations in caves of Carlsbad Caverns. New Mexico, December 26, 2007
Stalactites and massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Lions Tails hanging in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Travertine speleothems along a passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Columns in a small side alcove in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Massive stalagmites in Hall of Giants of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Ocotillo bush near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Plants in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Fresh snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Cholla cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Huge stalagmite named "Rock of Ages" in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Irregularly rounded- or scallop-shaped passages in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Agaves and cacti in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
A narrow stalagmite with a large cluster of stalactites in the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalactites and stalagmites in a small alcove along the side of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Bone-shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Irregularly shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Prickly pears cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
Drapery and ripple-shaped patterns of travertine flowstone speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Speleothems (including stalactites, stalagmites, a column, and helictites) in an alcove of the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
Stalagmites in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Stalactites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
A hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
The Watchtower in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
A cave in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Stalagmites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Pluto s Anteroom(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Spacious hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
The King s Throne in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
Hall of the Mountain King(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
George Ashby s Phillips 66 gas station at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
Jackie and Hall Olds (Hal Old) store, grocery and cafe at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
A sign near Orla grocery near historical marker No. 3876 at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
Orla cafe served to feed workers in oil, gas, and sulphur fields, at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
Turkey Peak in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 24, 2007
Passage between stones on Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 24, 2007
Sabinal River from East Trail in Lost Maples State Natural Area. Vanderpool, Texas, December 30, 2007
Waterfall of Can Creek from West Trail in Lost Maples State Natural Area. Vanderpool, Texas, December 30, 2007
Cacti on a slope of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 24, 2007
Yucca on a hill west from entrance in Davis Mountains State Park. Fort Davis, Texas, December 29, 2007
Agricultural emblem over the entrance of Civil Engineering Building on campus of Texas A and M University. College Station, Texas, December 19, 2007
Horse skull statue at the entrance of Animal Industries Building on campus of Texas A and M University. College Station, Texas, December 19, 2007
Sickle and rye emblem over the entrance of Scoates Hall (Agricultural education) on campus of Texas A and M University. College Station, Texas, December 19, 2007
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
- Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
A boardwalk in Cook Natural Area in fog. Princeton, New Jersey, March 23, 2007
A boardwalk in Cook Natural Area through a marsh in fog. Princeton, New Jersey, March 23, 2007
A marsh in Cook Natural Area at sunset. Kingston, New Jersey, April 2, 2007
A marsh boardwalk in Cook Natural Area. Princeton, New Jersey, March 23, 2007
Entrance path of Laskovy Beach in Solnechnoe, west from Saint Petersburg. Russia, September 5, 2017
Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
A stone bridge (1937) across Heathcote Brook in Cook Natural Area. Kingston, New Jersey, April 28, 2007
Climbing Turkey Peak in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
A stone bridge across Heathcote Brook in Cook Natural Area at sunset. Kingston, New Jersey, April 2, 2007
A deer on Linear Park Trail (former railroad) in Cook Natural Area, near Ridge Road. Kingston, New Jersey, May 11, 2007
A path in Delaware and Raritan Canal State Park. Kingston, New Jersey, May 7, 2007
Weathering of rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Weathered stones on a slope of Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Lichens on rocks near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Rocks east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Cacti east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
A path between Millstone River and Delaware and Raritan Canal in fog. Kingston, New Jersey, April 2, 2007
A path in Delaware and Raritan Canal State Park. North from Kingston, New Jersey, May 7, 2007
A path between Lake Carnegie and Delaware and Raritan Canal. Princeton, New Jersey, April 9, 2007
Heathcote Farm (1857, a former State juvenile detention center, now Withington Estate) in Cook Natural Area. Kingston, New Jersey, May 11, 2007
Prickly pear cactus on Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
A path in Delaware and Raritan Canal State Park, near Carnegie Lake. Kingston, New Jersey, May 4, 2007
A path in Delaware and Raritan Canal State Park, with a milestone in foreground. North from Kingston, New Jersey, May 7, 2007
A path in Delaware and Raritan Canal State Park, near Washington Road bridge. Princeton, New Jersey, May 3, 2007
The path of Deer Run Trail in Lick Creek Park after ice storm. College Station, Texas, January 17, 2007
Entrance of the mall and Caesars Casino. Atlantic City, New Jersey, March 24, 2007
Rocks on a slope of Freshman Mountain east from Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
The path of Deer Run Trail near the bridge in Lick Creek Park after ice storm. College Station, Texas, January 17, 2007
Entrance of Majolica Room in Hermitage museum. Saint Petersburg, Russia, August 14, 2007
A maple branch on a path in Delaware and Raritan Canal State Park, near Washington Road bridge. Princeton, New Jersey, May 3, 2007
A creek near northern entrance of John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
Entrance of Tukish Room from Mauritanian Parlor in Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
Nike Missiles at the entrance of Fort Hancock Historic District. Sandy Hook, New Jersey, March 11, 2007
Pedestal rock (differential weathering) near Turkey Pass Trail in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Mushroom rocks (differential weathering of shaded sides of rocks) in Enchanted Rock State Natural Area. Fredericksburg, Texas, October 27, 2007
Small grey Clitocyboid mushrooms Rhodocybe(?) on a side of a sandy path near the entrance in Washington-on-the-Brazos State Historic Site. Washington, Texas, September 5, 2022
Skunk cabbage along a creek near northern entrance of John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
A forest near Devil s Cave near northern entrance of John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
Skunk cabbage near a creek near northern entrance of John Witherspoon Woods park. Princeton, New Jersey, April 28, 2007
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