Controversially restored in the 1970s, this giant 15th-century mosque is shrouded in legend.

Antoine de Saint-Exupéry's 1943 book shares a surprising connection with El Salvador.

A major pre-Columbian archaeological site in central El Salvador.

A Mayan village preserved for centuries in volcanic ash.

A semi-scholarly approach to sex.

An artist's cute bronze subway sculptures belie his violent artistic past.

Jimi Hendrix's legendary recording studio in Greenwich Village.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Elevated freight railway turned wildly successful urban park.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

The "Seinfeld" diner.

Order savory Levantine baked goods with innovative twists at this takeout-only spot.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

The only thing these street signs will help you navigate is your imagination.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

Comprised of Spanish war cannons, this sculpture once graced the bow of a WWI warship.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

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