Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A tunnel with windows, so you don't miss out on the impressive views.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A spiritual vortex among the red rocks in Sedona.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

A natural dome made of volcanic glass in Inyo National Forest.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

This popular pilgrimage site offers a hole filled with holy healing dirt.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A sprawling collection of over 106,000 toys from around the world.