The retired vessel is South America's first floating museum.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

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

Man-made geyser that rises to the exact height of the Gateway Arch.

In a historic steel foundry east of the Mississippi River, thousands of wooden crates hold the architectural remnants of buildings long gone but not forgotten.

Out of a labyrinth of abandoned tunnels and stops, this Queens subway station is arguably the most mysterious—if it exists at all.

An eatery for UFO seekers on the Extraterrestrial Highway.

A Nevada mining boomtown that ran out of silver and luck.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

The longest living non-clonal organisms on Earth.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

The only museum of sake in the United States is nestled in an unlikely California college town.

A private home built to resemble the shape of a microscopic creature.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

An obelisk commemorating Lincoln's role in connecting the coasts.

A cableway for car transport.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

An abandoned town is hidden in Great Smoky Mountains National Park.

This award-winning men's bathroom was just too beautiful to not allow women to see.

Walk the whole Mississippi River!

Enormous lake at the bottom of a unique cave system.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.