The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

The silent film master's legacy commemorated in all the right and wrong places.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

A long and winding trail through history led to the current iteration of this mountaintop tower.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

Three acres of mythology-inspired sculptures are visible from the highway.

A gigantic sculpture garden is packed with innovative oddities.

Before becoming a public park, this spot was a shell midden, a fort, and an amusement park.

This former coal gasification plant found a curious second life as a popular public park.

This 75-year-old Shakespearean sculpture is painted by a local artist for every season.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

Unusual finds in this shrine to local law enforcement include a 19th-century vampire-slaying kit.

This historic tall ship traveled 1.5 million miles around the globe, and once did duty as the mythical pirate ship in Peter Pan.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.