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

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

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

A miniature train theme park, free to the public, laying at the base of the Santa Monica Mountains.

Perched high atop telephone poles is an uncanny outdoor art gallery that greets passersby on their commute.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.

Every weekend, the parking lot of this Buddhist temple turns into a Thai street-food paradise.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

America's most famous piece of self-built architecture.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

The house that Southern rock built now stands as a monument to one of the genre's favorite families.

At Macon’s oldest cemetery two members of Allman Brothers are buried side by side.

Fall through a crack in the seams of reality at this immersive art installation.

With over 5,000 champions, the Hall of Fame continues to draw amateur eaters.

The museum moved on, but the diorama remain.

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

In Grand Rapids, Michigan, a marker honors the creation story of a proud fictional culture.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.