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

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

Campus tradition says couples who walk beneath this enormous oak will stay together forever.

Decades of discarded bottle caps line this alleyway, a fixture of Texas A&M.

Resting place of the Texas A&M canine mascots, who watch the game from the grave with their own miniature scoreboard.

This relic of 19th-century infrastructure is one of the few remaining coal gas storage tanks in the U.S.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A chessmaster's dream destination.

An enormous natural sandstone bridge in Kentucky.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

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

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

A spur fit for a giant sits just off Highway 281 in Texas.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Pluto is still considered a planet in Ithaca, New York.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.