Geology

An artificial cave littered with semi-precious stones waiting to be picked up.

A narrow fjord-like lake, the third-deepest in the United States, runs for over 50 miles into the Cascades of Washington state.

Jurassic clays where the dinosaurs once roamed.

These rugged, color-stained mountains hold the secrets of the Kazakh desert.

This small canyon is home to a treasure trove of geological oddities.

This U.S. natural reserve is an ancient spiritual place and rock climber’s paradise.

Idaho’s largest, deepest limestone cave is known for its quirky rock formations and bat population.

Mythological depictions of Laos’ national animal make this cave sacred.

A limestone cave filled with impressive formations in Mole Creek Karst National Park.

This often-overlooked canyon dazzles and intrigues with its many layers of colors, shapes and odd formations.

A remote Arctic museum focusing on the science of icebergs and the archaeology of an ancient Inuit settlement which lies just outside its doors.

Visit Europe's largest subterranean waterfall, carved by water from the glaciers of the towering peaks surrounding the valley.

An unusual double cinder cone with a bent oval crater, in the Lunar Crater Volcanic Field.

This volcanic crater lake is renowned for its perfectly round shape, stunning blue-green waters, and unique geological properties.

This circular artwork represents the ancient microscopic organisms that created the chalk foundations of the North Downs Way.

Some 46,000 years ago, a volcanic eruption led to a flooding event that carved this short canyon with steep vertical walls.

An outdoor gallery of sculptures chiseled from a unique stone that deemed Arequipa's old town a UNESCO World Heritage Site.