One-layer pyramid in Indiana.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

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.

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

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

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

The bones of an old zoo crumbling in the shadow of a new one.

Dilapidated Mayan-themed ballroom was one of Detroit's most popular venues through the 40s.

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

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A place for ship-lovers to watch the passage of freighters traversing the Great Lakes while learning about their history.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

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

Where the Model T was made and the assembly line was invented.

Over 60 chemical plants and oil refineries sit in a 15-mile-wide section outside town.

Weighing 30,000 pounds, this monument represents Detroit's first industrial era.

This freshwater spring fills with 10,000 gallons of water per minute.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

This shallow cave got its name from copious amount of human bones found inside.

Strange physical sensations and optical contradictions keep visitors coming back for more.

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

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.