Climb down into the largest sinkhole in Qatar.

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

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

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.

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

This extraordinary geological oddity resembles human-made pavement.

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

One of the largest cat sanctuaries in North America is considered a "Club Med" for felines.

Located in Nairobi National Park, this animal orphanage is the oldest of its kind in Kenya.

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

These free-roaming horses were once destined to disappear from the land.

In paradise, feral pigs have claimed an island all to themselves.

Only 68 people per day are allowed to visit this New Zealand bird-watcher’s paradise.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

These particularly resplendent rodents are the state animal of Maharashtra.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

An elegant sandstone stairway built by the WPA still connects two neighborhoods in Akron.

Local lore says a serpent-like beast lurks in the deep basin below the falls.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.