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CAVE DIVING
Cave diving in the Riviera Maya
Tulum, Mexico
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CAVE DIVING
Cave diving on Cozumel Island
Mexico
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LAVA TUBES OF ICELAND
The 10th International Symposium of Vulcanospeleology
Reykjavík, Iceland, September 2000
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LAVA TUBES OF KOREA
The 13th International Symposium of Vulcanospeleology
Jeju Island, Korea, September 2008
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LAVA TUBES OF NEW MEXICO
Photos from Harry's five-year mapping project of lava tubes of the Zuni-Bandera Volcanic Field, New Mexico
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LAVA TUBES OF WASHINGTON
Mount Saint Helens Pre-Convention Caving Camp
2006 National Speleological Society Convention
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CARLSBAD CAVERNS
Vertical caving in the Slaughter Canyon backcountry of Carlsbad Caverns, New Mexico
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GYPSUM KARST PROJECT (GypKaP)
Caving in UFO country near Roswell, New Mexico, in the infamous stream tunnels of Gypkap, New Mexico
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NSS CONVENTION 2000
The 2000 National Speleological Society Convention
Old Timer's Reunion site in Dailey, West Virginia
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NSS CONVENTION 2005
The 2005 National Speleological Society Convention
TAG country (Tennessee, Alabama, Georgia)
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NSS CONVENTION 2006
The 2006 National Speleological Society Convention
Bellingham, Washington
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NSS CONVENTION 2007
The 2007 National Speleological Society Convention
Marengo, Indiana
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OTR 2000
Old Timer's Reunion
Dailey, West Virginia
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OTR 2001
Old Timer's Reunion
Dailey, West Virginia
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OTR 2009
Old Timer's Reunion
Dailey, West Virginia
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