When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

Hundreds of protractors affixed to surfaces all over the city.

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

A giant ball made from pieces of an old Jeep.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

This icon of the Atomic Age now lays dormant.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

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

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

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.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

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

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

A piece of baseball history is preserved in a Pittsburgh parking lot.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.