This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Oldest synagogue in the United States.

The oldest still-operating tavern in the United States was once owned by a pirate.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

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

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Now a city park, this site started as a stage stop, then was a working ranch, and finally became a dude ranch that specialized in letting wannabe divorcees establish Nevada residency.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Perhaps the most scandalous statue of America's first president.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

A super-sized promotional trick that is now a D.C. landmark.

The walls of the iconic dome are hollow and have a secret stairway.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Home to items never before seen by the public.

The romance of early commercial flight still fills this Art Deco destination.

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