James St. John:
Rappelling down the Hidden River Cave sinkhole (Horse Cave, Kentucky, USA)
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 1
James St. John:
Hidden River Cave sinkhole (Horse Cave, Kentucky, USA)
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 2
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 3
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 4
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 5
James St. John:
Colonial rugose coral (St. Louis Limestone, Middle Mississippian; Hidden River Cave, Horse Cave, Kentucky, USA) 1
James St. John:
Colonial rugose coral (St. Louis Limestone, Middle Mississippian; Hidden River Cave, Horse Cave, Kentucky, USA) 2
James St. John:
Colonial rugose coral (St. Louis Limestone, Middle Mississippian; Hidden River Cave, Horse Cave, Kentucky, USA) 3
James St. John:
Sunset Dome (Hidden River Cave, Horse Cave, Kentucky, USA) 1
James St. John:
Sunset Dome (Hidden River Cave, Horse Cave, Kentucky, USA) 2
James St. John:
Fenestrate bryozoans (St. Louis Limestone, Middle Mississippian; Hidden River Cave, Horse Cave, Kentucky, USA) 1
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 6
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 7
James St. John:
Hidden River Cave (Horse Cave, Kentucky, USA) 8
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 1
James St. John:
Suspension bridge in Hidden River Cave (Horse Cave, Kentucky, USA) 1
James St. John:
Suspension bridge in Hidden River Cave (Horse Cave, Kentucky, USA) 2
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 2
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 3
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 4
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 5
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 6
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 7
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 8
James St. John:
Mudcracks (Hidden River Cave, town of Horse Cave, Kentucky, USA) 9