The fountain marks the area where hundreds of accused witches were burned at the stake.

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

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

Antique cinematography artifacts fill this museum dedicated to the inventors of the moving picture.

A lush indoor jungle fills this bustling Madrid transportation hub.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This lucky bronze frog was gifted to Madrid by a casino.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Nicknamed the "Museum of Horrors," this French anatomical collection has been fascinating visitors for over a century.

A small church ornamented with medieval erotic sculptures.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

An Italian hillside ghost town.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Southern Italy's spinning top village.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

One of seven Jewish catacombs in Rome and one of only two open to the public.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.