A beautiful geyser under environmental threat.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

Site of the greatest known waterfall that ever existed.

A comedy troupe's collection of bizarre humor.

You don't have to visit the deep blue sea to see these majestic creatures swimming wild and free.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

There aren't too many operational funiculars around, but Pittsburgh has two!

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

Moonbows over Kentucky.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

One street divides a single town that stands in two U.S. states.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

Large one-man sculpture park in Michigan.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This memorial to the Mercury Seven astronaut stands at the site of his former elementary school.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

You thought Santa Claus didn't exist, but it turns out you were wrong.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

The first declared National Monument in the United States.