A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

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

For decades, it has disappeared and reappeared as water levels rise and fall.

An abandoned stretch of highway, deteriorating next to the operational one.

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

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

The time thousands of bags of chips washed ashore in the Outer Banks is memorialized in a local museum.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.

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

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

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

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

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

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

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

Could it have picked a better place to land?

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

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

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

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

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

Hundreds of protractors affixed to surfaces all over the city.

This ancient Chinese observatory still contains early astronomy technology.