This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

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

A spectacular overlook of the Little Grand Canyon of the San Rafael River, a deep sandstone gorge streaked with orange, red and white in a remote, uncrowded part of Utah.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

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

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This historic national park is covered in the stunning ruins of red rock pueblos.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

The fifth-longest natural arch in the world, and the longest outside China.

This ghost town was once a cult-like religious utopian settlement.

A whimsical village of unique treehouses resides in a Washington forest.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

This geothermal hot spring hides beneath a slowly growing mineral dome.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

This amazingly preserved Gold Rush town is a historian's dream.