An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

This Manchester laundromat is hiding something.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

Once America's tallest structure, now a Baltimore landmark.

Eighteen miniature death-scene dioramas.

The U.S. government built the million-pound stack of steel during the Space Race.

One of the world's largest model railroads is a mind-boggling achievement.

An elderly widow still operates the incredibly detailed model railroad she and her husband built by hand.

An impressive collection of farm equipment and other artifacts from life on the prairie.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

A young Italian couple has been locked in an embrace for over 6,000 years.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

A slightly surreal menagerie of structures that were lovingly spared from demolition and reconstructed in a field.

A remarkably well preserved tower dating all the way back to the Iron Age.

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

This 19th century train workshop is a treasure trove of railroad history.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.

This restored colonial house was once home to the botanist responsible for bringing avocados to the U.S.

The only parking meter in the entire town, it is surrounded by 100 free spaces.