If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

This abandoned Greek island was the last active leper colony in Europe.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

Temple complex that once housed the famous statue of Nike.

An autonomous republic of Orthodox monks.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

This small museum tucked within a subway station holds pieces from Madrid's past.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Home to drunken tower-climbing goats... seriously.

Walk the whole Mississippi River!

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This former lieutenant governor's home is brimming with curiosities.