Sunken, rock-hewn Christian church, in rural landscape, Lalibela, UNESCO World Heritage Site, Ethiopia, Africa

The Sunken Rock Hewn church of Bet Giyorgis (St George), Lalibela, Northern Ethiopia, Ethiopia, Africa *** Local Caption *** The most famous of Lalibela's Rock Hewn churches, The Sunken Rock Hewn church of Bet Giyorgis, 'St. George', dating from the 12th Century, Lalibela's Rock Hewn Churches rank amoung the greatest religio-historical sites, not only in the African continent but in the Christian World

One of the Stations of the Cross, Salt Cathedral of Zipaquira, Cundinamarca department, Savannah of Bogota, Colombia, South America

Main altar in the new Salt Cathedral of Zipaquira, Cundinamarca department, Savannah of Bogota, Colombia, South America

The Agape Table, St. Pauls catacombs, Rabat, Malta

The Catacombs in the Church of St. Francis, Porto, Norte, Portugal, Europe

The Catacombs in the Church of St. Francis, Porto, Norte, Portugal, Europe

The Catacombs in the Church of St. Francis, Porto, Norte, Portugal, Europe

Cavern Church, known as Abu Serga, Christian Coptic church, Cairo, Egypt, North Africa, Africa

Salt cathedral of Zipaquira, Colombia, South America

Christian cross, Salt cathedral of Zipaquira, Colombia, South America

Salt cathedral of Zipaquira, Colombia, South America

Christian cross, Salt cathedral of Zipaquira, Colombia, South America

Crypt, Lecce Cathedral, Cathedral of Maria Santissima Assunta and Sant'Oronzo, Lecce, Salento, Apulia, Italy

Underground church, Coober Pedy, South Australia, Australia, Pacific

Underground church, Coober Pedy, South Australia, Australia, Pacific

Underground church, Coober Pedy, South Australia, Australia, Pacific

Crypt beneath the altar at La Parroquia, the famous parish church of San Miguel de Allende, Mexico.

Altar in the underground pillared hall of the pagan crypt, 10th century, Cathedral of St. Sepulchre, Basilica Cattedrale di San Sepolcro, Aquapendente, Lazio, Italy, Europe

Water mirror of the Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

Cross-shaped stone opening in the underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

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

Column capitals in the underground pillared hall of the pagan crypt, 10th century, Cathedral of St. Sepulchre, Basilica Cattedrale di San Sepolcro, Aquapendente, Lazio, Italy, Europe

Cross-shaped stone in the underground Salt Cathedral of Zipaquira, Cundinamarca, Colombia, South America

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

Dome of 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

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

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

Biete Gabriel Ruphael (House of the angels Gabriel and Raphael) Ethiopian Orthodox rock-cut church in the Southern Group of the Rock-Hewn Churches, Lalibela, Amhara Region, Ethiopia

Cathedral of San Lorenzo, Lugano, Ticino, Switzerland