Nature

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

Gigantic Romanian salt mines used to heal respiratory conditions.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Underwater volcanic eruption forms new island off the coast of Tonga.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

One of Chile's most active volcanoes is riddled with beautiful caves.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

This extinct shield volcano is the lightning rod of the Cascades.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Dig for your own trilobites in this goldmine of invertebrates.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Famous for its bio-luminescent inhabitants, known as "dismalites."

A preserved oak tree about 3,500 years old found in Riga, Latvia.

The largest tidal whirlpool in the Western Hemisphere.

A very big rock just plopped down in the New England woods.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.