Hollowed out cedar log tubs set in an ancient towering forest.

This frequently-photographed waterfall takes only a short hike to visit.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The first declared National Monument in the United States.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Stroll through a wonderland of stupendous moss-covered trees.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

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

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

One of almost 200 confirmed impact craters in the entire world, untouched for tens of millions of years.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

148 feet long and in the middle of a verdant forest.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

These eerie outliers of the lightning bug family glow a mysterious blue color.