A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

A natural swimming hole that was once a ceremonial center for Mayan priests.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

An overlooked memorial honoring the local Washington residents who died in World War I.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

There’s a hidden military meme engraved on the World War II Memorial.

A rare view of a preserved Victorian science museum.

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

The world’s first penitentiary, meant to be humane, drove men insane.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Built in 1512, the oldest cathedral in the Americas.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

The world's brightest bioluminescent bay.

On this Puerto Rican island, many abandoned naval ammunition bunkers sit open while a few have been padlocked by locals as personal storage.

Cabins once lived in by Butch Cassidy and the Sundance Kid are featured at this Old West living history museum.

This largest dinosaur tracksite in Wyoming is one of the only in the world from the Middle Jurassic Period.

This archaeological dig site and museum is home to one of the largest dinosaur fossil collections in the world.

This Alaskan town appoints the general store's resident feline as honorary mayor.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A scattered cemetery of medieval tombstones, each carved with indivdual patterns and scenes, overlooking a bright blue lake.