This remarkably simple jail went over a century without an escape.

The stately birthplace of California's statehood.

A tree grown from astronaut seeds which were exposed to cosmic rays.

An abandoned boat that's been stranded mysteriously for decades.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

A strange house built only at night, with rumored mystic inspiration.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

One of the world's earliest skyscrapers.

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

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

This church houses the “incorrupt” body of its founding Bishop.

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

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

The largest known Ancient Egyptian obelisk.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

The once highest point in China blends symbolic design with a kick of adrenaline.