This Roman monument is surrounded by more recent construction, offering a stark contrast between ancient architecture and the modern urban landscape.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

This beautiful 14th-century castle perched on a promontory overlooks the Bay of Trieste.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

The "Mona Lisa" of funerary art.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

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