The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

The highest bridge in America was built for an almost unnervingly small amount of money.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Legends surround this jagged rock formation in the New Mexico desert.

Now containing the bones of the actual conquistador, instead of someone else.

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

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Less a museum than a bizarre fantasy world created by artists and engineers.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A miniature city built by a single hunchbacked monk.

The highest point in Louisiana, Driskill Mountain at 535 feet above sea level.

A large stone map of Arkansas awaits visitors to its highest point.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Monument to the cotton-destroying boll weevil.

As state high-points-by-elevation go this spot is one of the lowest, but for years it was also the hardest to climb.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

This historic train station has been converted to a locomotive themed hotel.

A pocket of jungle amidst urban expansion in Panama.

A lover's walk between hilltop towns, decorated with graffiti love notes.