A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

Ice roads, deep holes and 3,500 pounds of diamonds.

Natural earth mounds formed in the far north.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

A table rock formation that has been intriguing West Virginians for years.

The former Naval shipyard is open for exploring - mostly.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Native Americans built this circle of stones, which was used to predict astronomical events.

The largest source of fossilized insects anywhere.

A stealthy Apache hideaway that became the haunting site of a mass grave.

The clock that sets them all.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

Rippling sand dunes frozen in the Arizona rock.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The world's largest vertical wind tunnel.