Friction between grains of sand cause a curious "singing" sound.

The only place in America where anyone who wants can shovel coal aboard an antique train.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

This Wild West attraction is alive with glitching automatons.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

This giant rock arrived at this quiet park thousands of years ago on the back of a massive glacier.

This whimsical stacked cabin looks like something out of a children's book.

At nearly 1,000 feet long, this astonishing glass suspension bridge is one of the longest in the world.

The latest in a series of long glass bridges suspended at terrifying heights.

11,500 year old little girl found buried in an ancient fire pit.

This colorful overpass is one of Bhutan's longest suspension bridges.