Mexico, In the Starboard Cave of Sumidero canyon Mexico, Western Access to the Cenotes of Hacienda… Mexico, Waterfall at the Western Access to the Cen… Mexico, In the Cenotes of Hacienda Mucuyche Mexico, Exit from Eastern Hall of the Cenotes of H… Mexico, Clear Water in the Cenotes of Hacienda Muc… Mexico, Swimming in the Cenotes of Hacienda Mucuyc… Mexico, Waterfall at the Eastern Access to the Cen… Mexico, Darkness in the Eastern Hall of the Cenote… Mexico, In the Eastern Hall of the Cenotes of Haci… Mexico, Eastern Hall of the Cenotes of Hacienda Mu… Iceland, Crystallic Basalt Columns outside the Hál… Iceland, The Cave of Hálsanefshellir Dominican Republic, Ferry in the Cave of Three Eye… Dominican Republic, In the Cave of Three Eyes (los… Dominican Republic, The Cave of Three Eyes (los tr… Namibia, Spitzkoppe Mountains, a Huge Crack Looks… Turkmenistan, Exit the Cave of Köw-ata Turkmenistan, Bakharden Underground Warm Lake in t… Ethiopia, At the Entrance to the Cave Church of Ye… Ethiopia, The Cave Church of Yemrekhana Krestos Ethiopia, The Cave Church of Yemrekhana Krestos, C… Ethiopia, The Cave Church of Yemrekhana Krestos, T… Ethiopia, The Cave Church of Yemrekhana Krestos, T… Ethiopia, In the Courtyard of the Cave Church of Y… Ethiopia, Priests of the Cave Church of Yemrehana… Portugal, Sintra, Leda's Cave in Quinta da Regalei… Portugal, Sintra, Cave Labyrinth in Quinta da Rega… Portugal, Sintra, Cave Labyrinth in Quinta da Rega… Portugal, Sintra, Iniciatic Well in Quinta da Rega… Bolivia, The Cave on the Top of Isla del Pescado (… Бакотский Пещерный Монастырь / The Cave Monastery… Бакотский Пещерный Монастырь Грот Коба-Чаир Грот Коба-Чаир Entrance to Demanovska Cave of Freedom Inside Demanovska Cave of Freedom Inside Demanovska Cave of Freedom Entrance to Postojnska Cave Inside Postojnska Cave Predjamsky Castle Predjama, View from Castle Krk, Biserujka Cave