Geological Oddities

The world's first and only natural nuclear reactor.

A volcanic fissure over two miles long and up to 70 feet deep.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Mysterious rocks that ring musically when struck.

Mysterious "dots" seen from a satellite in southeast Peru.

Made by river sediment, it is the largest alluvial fan in the world.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

An island said to shake with the current.

A volcanic landmark located on an Ice age lake bed.

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

Giant granite rocks standing end-to-end like a train of circus elephants.

Two massive rock outcroppings on the Oregon coastline.

Site of the greatest known waterfall that ever existed.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

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

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

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A toxic lake near a volcanic caldera that is home to flamingos and other life.