The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

One of the most important yet well-hidden museums dedicated to the history of medicine.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A Nesting Doll of Churches.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Jesus' footprints and the first catacombs in the world.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Stocking up on the world's best beer requires a pilgrimage to a monastery drive-through.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Christ's blood preserved in a Belgian town.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A giant bug impaled on a 75-foot-tall needle.

When you're a great Russian Tsar, even your vomit gets a statue.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

Cozy basement bar sports an inventory of over 2,000 beers.

The Devil’s own choice when he needs a drink in Brussels.

Climb inside an iron crystal magnified 165 billion times its normal size.