68. Santa Elena Canyo9n, 2000 feet deep. Cave, 200 ft. in diameter, on Mexico side

68. Santa Elena Canyo9n, 2000 feet deep. Cave, 200 ft. in diameter, on Mexico side, Box: 1. Fred and Otto Vogel Photographs, 1994-14. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/362993 Accessed September 25, 2026.