This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A Nessie-like monster supposedly lurks in this lake.

At 207 feet, one of the world's longest continuous escalators.

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

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

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

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

One of the oldest living oak trees in the Southeast.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

Elvis's own personal tropical hideaway.

Take a drunken tour inside the world's largest known geode.

This massive airship factory is so large that it has its own indoor weather.

A real flying saucer, contracted by the U.S. Air Force.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

The home of the first American-born saint is one of the only curved buildings in New York.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Try not to get slimed in Tribeca.

Climb inside an iron crystal magnified 165 billion times its normal size.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.