Buildings from the fictional planet of Tatooine still litter the Tunisian desert.

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

The legendary building that needed ghostly approval before being built.

Hundreds of hidden passageways weave through the old quarters of Lyon.

A dangling church built over a Colombian gorge.

A marvel of Byzantine engineering under the streets of Istanbul.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

Roadside collection of 65,000 signs.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

400-year-old garden, restored to beauty.

For over 300 years this little carving has been the city’s good luck charm.

Once the home of a hermetic monk, this cave now houses a small church.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

An ancient city exhumed from the depths of the ocean.

Medicinal spa created with the discharge from a geothermal energy plant.

Natural cathedral designed by Italian artist Giuliano Mauri.

The largest game reserve in Africa is home to thousands of species but refuses to house humans.

Home to the world's oldest functioning orrery.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

An exquisite tunnel of cascading flowers.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.