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

A 131-year-old wunderkammer of Texas history.

Where the oil industry began.

Yo, Adrian!

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

Decades before the scandal, this staircase on the river was a literal "water gate."

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The ruins of the suspension bridge hang over Kingsbury Run as a ghost of racial prejudice.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Soaring over the Niagara Whirlpool since 1916.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.