This tiny patch of arid sand sits in one of the greenest states in the United States.

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

These azure waters were thought to lead to the Mayan Underworld.

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

A private home built to resemble the shape of a microscopic creature.

The highest point in Virginia can only be reached by passing through ponies and flowers.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

The oldest operating pharmacy in the world features 800-year-old recipes.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Water and windows define this defensive Italian well.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Pivotal home of Nobel Prize winner Pablo Neruda.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Walk the whole Mississippi River!

This replica of the Greek structure is in the heart of Nashville.

A toxic ghost town sitting atop a massive coal fire.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A former major munitions plant that has been converted into a sprawling art space.

At 207 feet, one of the world's longest continuous escalators.