The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A giant Troll lurks under one of Seattle's oldest bridges.

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

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Try not to get slimed in Tribeca.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A bizarre house filled with an astounding array of collections.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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.

An enormous, inside-out glass globe built in 1935.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

An emerald-green grotto just a short trip from Austin.

Most-visited and most-photographed slot canyon in the American Southwest.

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.