The gigantic Gruta de Benagil sea cave (Benagil Cathedral), Algarve, Portugal

Woman looking at the giant entrance of the Cathedral caves, The Catlins, South Island, New Zealand, Pacific

Woman standing in the giant Cathedral caves, The Catlins, South Island, New Zealand, Pacific

Marble Caves Sanctuary, Marble Cathedral on General Carrera Lake, Puerto Rio Tranquilo, Aysen Region, Patagonia, Chile, South America

Cave as an entrance to the beautiful Cathedral Cove, Coromandel, North Island, New Zealand, Pacific

Cave as an entrance to the beautiful Cathedral Cove, Coromandel, North Island, New Zealand, Pacific

People at Cathedral Cove, Coromandel Peninsula, Waikato, North Island, New Zealand, Pacific

View from a cave onto a sandy beach and the sea at sunrise, Cathedral Cove, Coromandel, Canterbury, North Island, New Zealand, Oceania

Underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Silhouette of a person in front of cave exit in backlight, cave washed out by the sea, Cathedral Cave, Waipati Beach, The Catlins, Southland, South Island, New Zealand, Oceania

Xanten, market place, cathedral St.Victor, NRW, Germany

Xanten, market place, cathedral St.Victor, NRW, Germany

Krauterermarkt at cathedral, Regensburg, Upper Palatinate, Bavaria, Germany

Stone shaped cross in the underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Reflection in water in the Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Zipaquira, Cundinamarca, Columbia

Figures of the Holy Family in the underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Altar of the underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Diver at one of the many openings around the dive site called First Cathedral off the island of Lanai, Hawaii, United States of America

Diver at the entrance to First Cathedral off the island of Lanai, Hawaii, United States of America

Diver outside of the dive site called First Cathedral off the island of Lanai, Hawaii, United States of America

Diver inside a cavern known as First Cathedral off the island of Lanai, Hawaii, United States of America