The majestic, sacred tree is represented on this piece of public infrastructure.

A honeycomb-like structure of interlocking shelves creates a beehive of books.

These gleaming gypsum sand dunes are the second-largest in North America.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A pair of gigantic baby heads greet passengers at Atocha Station.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

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.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This art shopping center still boasts pieces of its past as a textile factory.

Colonial architecture meets urban art in this sprawling open-air gallery.

This botanical garden boasts sculptures, industrial ruins, and an endorsement from the Dalai Lama.

Diego Rivera's massive tiled fountain and failed infrastructure project.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

A grand entrance to one of the world's smallest Chinatowns.

The extremely grey columns of one of Mexico City's most iconic beltways are slowly gaining a bit of color.