Nature

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A church of bones, decorated with 40,000 human skeletons.

A limestone wonderland of water and subterranean secrets.

Gorgeous cave resemble a winter wonderland.

Erosion and time have created a naturally-formed water park.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

This strange geological landscape erupts with sudden bursts of water.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

The once and future home of New Zealand's famed Pink and White Terraces.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

A sulfuric hellscape in southern Italy.

The world's most active stratovolcano is almost always erupting.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

Go surfing on this urban wave, "hacked" by local surfers.

Enchanting cave with a river crashing through the roof.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'