As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

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

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Inside this small chapel tucked away in the forest is one of the most well-preserved Danse Macabre frescos.

A medieval house with mysterious alchemical inscriptions on its facade

The “Sistine Chapel” of the Middle Ages merges 11th-century science and religion in wondrous hues.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

England's foremost purveyor of funeral furniture hasn't changed a bit since the 1960s.

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

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

An outsider folly near Madrid.

To fit bodies into this Renaissance crypt, they were first left to decompose in the crypt's rotting room.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

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

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.