The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.

A granite monument honors a beloved World War II canine mascot.

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

A retrofuturistic art installation in the Pittsburgh Airport.

A nine-hole golf course in Pennsylvania hasn't charged a greens fee since its founding in 1914.

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

Check out the 125-pound chocolate reindeer in the back of this candy shop.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

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

This dramatic rail curve was once the target of a failed Nazi attack.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This collection honors the iconic, and proudly American lighter that just won't quit.

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

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

"Where the ducks walk on fish."

This former open-pit manganese mine is now a massive graffiti canvas.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The drama of nature in full effect in this Nevada State Park.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A giant open-air sculpture made of over 200 full-sized boats.