James St. John:
Entrance steps to the Pass of El Ghor (Mammoth Cave, Kentucky, USA) 1
James St. John:
Entrance steps to the Pass of El Ghor (Mammoth Cave, Kentucky, USA) 2
James St. John:
Scallops (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
Fractured & faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Fractured & faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Fractured & faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
Canyon passage (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA)
James St. John:
Fractured & faulted limestones (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 4
James St. John:
Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 4
James St. John:
Vertical shaft (Black Hole of Calcutta, Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Vertical shaft (Black Hole of Calcutta, Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Scallops (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Scallops (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
1861 graffiti (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
1861 graffiti (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Vintage trash (Pass of El Ghor, Mammoth Cave, Kentucky, USA)
James St. John:
Scallops (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 4
James St. John:
Breakdown (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Breakdown (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Breakdown detachment site (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1
James St. John:
Breakdown (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
Breakdown detachment site (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 2
James St. John:
Breakdown detachment site (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 3
James St. John:
Breakdown (Pass of El Ghor, Mammoth Cave, Kentucky, USA) 4