Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

World's oldest and largest space launch facility, once a secret missile testing site.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

One woman's lifelong collection is on display in this unassuming house on an Icelandic fjord.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

A spectacular cave and a beguiling lake.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Underground monastery and fortress.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

A true Valhalla for cactus and succulent lovers.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Northern Ireland's Brobdingnagian stepping stones.

Caves full of Buddhist statues, incredible rock formations and a deserted lagoon.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

These delicate sand pyramids look like naturally occurring gothic spires.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.