The site of one of the deadliest skirmishes during the Battle of Fredricksburg.

This lavish 20th-century casino adorns labels for San Pellegrino water.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

The U.S. Navy’s preposterously detailed mini battleship took 77,000 hours to complete.

The National Park Service’s best-kept secret with views that rival any in D.C.

This groundbreaking 16th-century map is known as "America's birth certificate."

Press 1 for knock-knock jokes.

This unassuming passageway played a key role in one of the most important events in U.S. history.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

More than 12,000 years ago, this park was a playground for mastodons.

Hundreds of graffiti artists have decorated this flood-wall on the west bank of the Mississippi River.

An old tree that is the final resting place for many pair of shoes.

The longest of the four remaining covered bridges in Missouri.

These pink granite water slides are the result of millions of years of erosion.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

A subterranean haunt where wine and homemade biscottis are always on the menu.

Giant granite rocks standing end-to-end like a train of circus elephants.

Some of the oldest exposed rock formations in the United States.