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

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

A spectacular cave and a beguiling lake.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

A magical oasis in the middle of the Negev Desert.

Submerged ruins of a Neolithic coastal settlement, where houses, wells, graves and skeletons have been unearthed.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

You can row a boat through this ancient underground reservoir.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This clifftop arch is a natural stunner.

The ruins of a resort and casino sit on the banks of this blue hole spring that pumps 70,000 gallons of warm, clear water every minute.

This twisty sign depicts the chain's first logo.

The first free library in Georgia features an original Tiffany stained glass window of Mary Willis.

This protected reserve is home to a rare and beautiful species of flower.

This collection of ferns from across the globe is the largest assortment in the United States.

This wondrous hideaway is suspended in a bamboo forest above a sanctuary for rescued llamas and alpacas.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Beneath the surface, something slithers. And if you find it, prepare to be slimed and glowing.