This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

The building was originally a gas station built to resemble a Japanese tea house.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

The design of this modernist church was revolutionary when it was constructed in 1942.

This huge clock made of flowers and simple machinery was once used a political weapon.

The 34th governor of Kentucky was sworn into office while on his deathbed after being shot outside the State House.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

The first home and studio that belonged to the famous architect.

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

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Illegal drag racing two stories beneath Chicago’s streets.

To find the "unicorns of the deep" you've got to go downstairs.

Where dioramas can follow you home.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The blinking light atop the iconic landmark has been sending secret messages for decades.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

This giant temperature attraction created some giant electric bills.