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 Mexico, Clear Water in the Cenotes of Hacienda Muc… Mexico, Exit from Eastern Hall of the Cenotes of H… Mexico, In the Cenotes of Hacienda Mucuyche Mexico, Waterfall at the Western Access to the Cen… Mexico, Western Access to the Cenotes of Hacienda… Mexico, In the Starboard Cave of Sumidero canyon Бакотский Пещерный Монастырь Бакотский Пещерный Монастырь / The Cave Monastery… Dominican Republic, In the Cave of Three Eyes (los… 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, Bakharden Underground Warm Lake in t… Turkmenistan, Exit the Cave of Köw-ata 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… Грот Коба-Чаир Грот Коба-Чаир 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 (… Inside Demanovska Cave of Freedom Inside Demanovska Cave of Freedom Entrance to Demanovska Cave of Freedom Predjama, View from Castle Predjamsky Castle Inside Postojnska Cave Entrance to Postojnska Cave Krk, Biserujka Cave