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.

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

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

The plants form a living library and laboratory for researchers and students at Michigan State University.

A burial site located in the middle of a road.

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

Former utopian colony based on the belief that the universe exists in a hollow sphere.

A hidden beach at the end of a tunnel of mangrove trees.

In a town that's had a whole lot of giant chairs this one still stands tall, just not the tallest.

A real-life hidden Easter Egg in New Hampshire's capital city

All that remains the former site of the final home of president Franklin Pierce.