The remains of the second-oldest zoo in Europe can be seen within these library gardens.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

The clothes-washing king doubles as a community center with some unusual features, including an aviary filled with finches.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

A local scoured more than 1,000 acres for stone to create his masterpiece.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

A century-old magnolia tree is the only living landmark tree in New York City.

Traversing these canyons, visitors can take in stunning views and glimpses of the region's history.

An enormous illuminated figure dances on the Las Vegas strip.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A house carved into a rock in the 1940s.

The fifth-longest natural arch in the world, and the longest outside China.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

The largest self-built castle in the U.S., six decades in the making.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.