SPANISH MOSS CAVE, UTAH

April 29, 2016

POT-O-GOLD LAVA TUBE CAVE, IDAHO

April 18, 2016

GYPSUM LAVA TUBE CAVE-IDAHO

April 18, 2016

CUEVA DE LA TRONERA. COLOMBIA

Adam Haydock April 13, 2016

HOT SPRINGS OF THE SALT LAKE REGION, UTAH

April 13, 2016

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