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

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

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

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

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

This icon of the Atomic Age now lays dormant.

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

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

A star fort along the C&O Canal in western Maryland that protected America in three wars.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Pennsylvania's own Roswell-style UFO mystery.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

These old doors are covered in the signatures of Rehoboth Beach artists dating back to the 1930s.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

What began as an art installation is now the private drinkhaüs for a brewery's employees.