Geology

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.

These spindly, stone-capped formations are the product of glacial deposits and thousands of years of erosion.

Spectacular 300-foot cliffs in a lush mountain canyon.

Legend says that Wade the Giant scooped up a handful of earth to throw at his wife, leaving behind this round valley.