Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

Fossils, railroads, and waterfalls!

Home to the deepest rift anywhere on Earth.

Tour the original street level of Port Angeles, buried underground in 1914.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A 300-ship graveyard, with a few still visible at low tide.

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This elegant arc of a waterfall marks a religious turning point.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Climb right into the heart of this colorful Iceland volcano.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

An extraordinary mixture of natural beauty and man-made phenomena.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Half of a waterfall goes into the river while the other half seems to disappear.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.