This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

A lush indoor jungle fills this bustling Madrid transportation hub.

These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

"The Most Boring Road in the State."

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

One of the few working locomotive roundhouses in the United States.

Dating back to the 1800s, two imposing buildings in Michigan have had countless transformations over the years.

This observatory comes complete with three separate telescopes and a dedicated community of amateur and expert astronomers.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

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

An ever-evolving wall of graffiti art off East Liberty Street.

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

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

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

An underground city of salt.