The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Copenhagen's celebrated theme park and gardens.

20-foot tall lamp mumbles Swedish to celebrate the holidays.

This chimerical bridge/tunnel appears to dead end right into the sea.

Swedish skyscraper with a 90° twist.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

An underground city of salt.

Tiny memorials honor individual victims of the Holocaust.

An adorably sweet display of sculpted Precious Moments figurines.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

A museum where visitors can learn about greyhounds and (more importantly) pet them.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

Curious rock formations in a tiny Kansas state park.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The world's largest military aircraft cemetery.

Take a monster truck tour around an ostrich farm in the middle of the desert.