Bronze footprints mark the path where a civil rights leader tried to march in peaceful protest before being knocked unconscious.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

A unique botanical garden housed in three giant geodesic domes.

The building was originally a gas station built to resemble a Japanese tea house.

This is not your typical jungle gym.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

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

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

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

Five candy-colored villages on the Italian Riviera.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.