Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

On the upper deck of this church-owned parking garage stand eight pillars topped with different Catholic saints.

A dazzling display of lights and crystals.

This restaurant proudly displays bread signed by the 39th president.

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.

Perched atop a brick smokestack, this enormous lug nut symbolizes the local minor league baseball team.

This mechanical wonder towers above a river in Michigan's capital city.

A horse-drawn 1858 steam pumper fire engine encased in glass on the front lawn of a Michigan insurance company.

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

This experiment in the lifespan of seeds will take a century before it is complete.

Housed in the university planetarium, the thousand-strong collection of tiny towelettes includes a used one from the hosts of Car Talk.

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

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

The first artificial white water river course in North America cuts right through an Indiana city.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

This historic hotel invented the chocolate brownie.

A military museum and library dedicated to the citizen soldier.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.