The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

This Old Testament garden features 100 plants from biblical times.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

Large collection from the 3rd millennium BCE.

Gladiators once walked this ancient, subterranean passage.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

Depending on the region's rainfall, this church may be partially submerged.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

A crumbling World War I fort that is reached through a series of concrete tunnels.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.