This elaborate tunnel is the first structure composed of cast concrete in the United States.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Wander down a side street dedicated to one of the members of the Beat Generation.

This small piece of railroad history sits behind the parking lot of a chain grocery store.

At this multicultural hub, refugee chefs serve the foods they miss most from home.

It's been called “Detroit’s largest art object.”

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

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

One of Detroit's most iconic fictional protectors, RoboCop, finally has a statue.

Detroit’s Eastern Market has been transformed into an outdoor museum with colorful murals that address social issues and symbolize the city.

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

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

This sprawling bookstore spans four floors and has more than a million books in stock.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

Concrete igloos standing across from what remains of the Michigan Central train depot.

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

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

An unrealized dream to wirelessly electrify the entire Earth.

A restored Shell gas station from 1937 that includes a tow truck, the original gas pumps, and the original office.

The oddly shaped, steam-spewing building is now an art studio and gallery.

An alternate history park where the Union Army loses the war... to dinosaurs.

Feel what it would have been like to live in Gettysburg during the pivotal Civil War battle.