An Orthodox church inside a small "Garden of Eden" built by a man who had a vision.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Four-story slides send people whizzing through the math department at this Munich university.

This red London phone booth once stood in front of Buckingham Palace and was used by the queen.

A surprisingly detailed model of one of the most powerful telescopes in the world.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

These jeweled relics have a scandalous and contested past.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

Hundreds of protractors affixed to surfaces all over the city.

This public park was the site of the largest civilian disaster of the Civil War.

The last street in Pittsburgh that's paved with wood.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Halloween spirit is alive and well in this small town, where residents race motorized caskets in a yearly tradition.

Housing the history of a small Ohio town that is known to some as the pottery capital of the United States.

Evidence from a brutal 1880s murder is on display at this former infirmary house.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

The ruined remains of a coal mining ghost town are hidden within the woods.

Antiques and recycled art surround this cabin designed to resemble a 19th-century schoolhouse.

A retrofuturistic art installation in the Pittsburgh Airport.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.