Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Rare recess caves fill this unbelievably beautiful Ohio park.

This extraordinary geological oddity resembles human-made pavement.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

Inside this museum is an ongoing excavation of an ancient shipwreck.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

The only road through the heart of Glacier National Park.

A once celebrated industrial wonder now lurks in a quiet corner of Flathead Lake.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Erosion and time have created a naturally-formed water park.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

Only known mainland rookery of the threatened Stellar sea lion.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Obscure Freemasons still live in D.C.’s largest private residence.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.