One of the most well-preserved temples of ancient Egypt.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A magical place that lets you play in and explore the world of Studio Ghibli.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An exquisite tunnel of cascading flowers.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This 50-ton ship on Orcas Island has never seen the ocean.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

Abandoned railway line circling the city of Paris.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

A seemingly endless landscape of pure salt stretches far across Bolivia.

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

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A giant Troll lurks under one of Seattle's oldest bridges.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Morocco's Argania trees are infested with nut-hungry goats.