First planned industrial community in the United States.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

When waves crash onto this section of beach, the rocks sing a song.

Advice-columnist's bell tower, paid for with pennies.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Astounding collection of coin-operated games and automata.

The world's largest fully steerable radio telescope.

These unusual rooms on wheels are holdovers from the 1960s.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Moonbows over Kentucky.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The secret city built by the Manhattan Project.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

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

What is it about mushrooms that makes people wish they lived inside of them?

An art deco ice cream shop covered in vintage tiles.

Extraordinary objects lurk in this quintessential regional museum.

The only surviving prototype for Buckminster Fuller's house of the future.

The oldest experimental corn field in America is still creating better ways to grow crops.

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