Bahamas Expedition 2005 Collecting Geochemical Samples from an Underwater Caves on San Salvador Island Explorers: Schwabe Exploration Zone: Sea: underwater caves, carbon dioxide, bacteria, limestone, water chemistry; Location of Activity Atlantic Ocean: Bahamas, San Salvador Island, Alter Cave; Period of Activity: 2001- current In December 2005, Dr. Stephanie Schwabe traveled with her students to San Salvador Island, carrying Wings WorldQuest Flag #6 into the dark recesses of Alter Cave. Stephanie had spent much of her life diving into the underwater caves in and around the Bahamas, and she continued to seek clues as to how these spectacular underwater caves were formed. She climbed into terrestrial Alter Cave to see if it would yield any evidence.