Crypt dedicated to San Casto, Cathedral of Saints Nazario, Celso and Vittore, Old Town, Trivento, Campobasso, Molise, Italy, Europe

A woman stands at the center of the medieval underground Catacombs of Jajce, a carved stone crypt and chapel illuminated by soft lighting within the historic rock-hewn complex.

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

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

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

Gonfalone Crypt, Tricase, Lecce, Salento, Apulia, Italy, Europe

Crypt, Basilica of Santa Maria in Cosmedin, Rome, Lazio, Italy, Europe

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

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