The blinking light atop the iconic landmark has been sending secret messages for decades.

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

Dozens of feral felines rule a segment of Hollywood's only graveyard.

Because there's no place like home.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

A crumbling hospital from the 1850s on Roosevelt Island.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

One of only two commuter aerial tramways in the United States.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A beautiful memorial tells the story of a formerly enslaved woman whose kindness shaped a burgeoning city.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

One of Los Angeles's first murals once vibrantly depicted the dangers of United States imperialism.

A cake-themed art installation tucked away in historic Chinatown.

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

A whimsical, but often overlooked clock in Park Avenue.

A semi-scholarly approach to sex.

The former hotel where Tesla invented the radio.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.