One person’s lost luggage is another person’s treasure.

The world's largest model of our planetary system.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's deepest subway station is also a stunning ecological wonder.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Stockholm's narrowest alley is barely over two feet wide.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

A wooden street sign is the last remnant of this 400-year-old alleyway.

Tucked away down this Baytown alley exists a one-of-a-kind art exhibit of technicolor umbrellas.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

What is the Thing?

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

This Old West prison built into the side of a cliff was said to be inescapable.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

All that remains of this small town is its mass grave and a myth of a voodoo priestess who predicted its demise.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

Surprisingly delicious Asian-style hot dogs.

No matter what the plaque under this massive legume says, this is not the world's largest peanut.

This Chinese-style quartz sundial was saved in its final hour.

A county library in rural Ohio houses one of the finest mineral collections in the world.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.