One of the most important Celtic-Roman archaeological sites in Spain.

This ancient amphitheater was restored in the early 1990s.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

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

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

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

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Five million people are laid to rest here, more than the population of Madrid itself.

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

Huge abstract sculptures of the Puerto Rican Flag.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

The 30,000-volume library is one of the world's most impressive poetry collections.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

Statue dedicated to the star of an old television show.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.