There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The oldest continually operating golf course in the United States.

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

A miniature golf course crafted inside the world's largest simulated cave.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.

This public space is speckled with the eerie remnants of a defunct amusement park.

A storybook church made from a mesmerizing medley of multi-colored stones.

This tiny museum kept in a B&B laundry room holds the death mask of notorious bank robber Pretty Boy Floyd.

This California artist's front yard acts as a gallery for his unique, scrap metal animal sculptures.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

After covering almost 1.5 billion acres, the survey's still not finished.

Francis Julius LeMoyne built this crematory in 1876; he was the third person to be cremated here.

Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

True to his word, George Swanson is buried in his white 1984 Corvette.

This little museum in the town where zombies were born celebrates the living dead.

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

A retrofuturistic art installation in the Pittsburgh Airport.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.