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

The last remaining tollhouse in Michigan built during the 19th-century plank road craze.

A monument celebrating the idea of reaching inaccessible places.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

A monument to the art of slicing people open.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

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

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

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

The statues honor the state transportation employees who've died while performing their work-related duties.

World's largest Christmas store.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

Inside the Wayne County airport is an amazing collection of lights and sounds.

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

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.