These 17th-century mummies are no longer naturally preserved, but remain on display today.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

A burial vault located under Tiber Island in the middle of the Italian capital.

Ancient catacombs form the foundation for this Rococo orgy of a church.

These lesser-known Maltese catacombs date back over 1,700 years.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

A hidden gem in the middle of the city's infamous Jewelry Quarter.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A neo-Gothic temple in central Mexico featuring a labyrinthine network of crypts.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

Historical figures from New York City's Catholic community reside in Midtown.

A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

A statue of the heroine who stopped time to save her betrothed.

In 1329, Christine Carpenter entered this small stone cell in the hopes of becoming a living saint.

Once the last route taken by condemned prisoners.

One of the oldest remaining Catholic churches in England is home to the hand of a 7th-century saint.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A full-scale sculpture of a mermaid and baby grand piano hidden underwater by David Copperfield.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.