A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A bit of retro transportation flair preserved in the world's largest department store.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

The rogue roots are gradually consuming some of the historic marble grave markers.

This taxidermy horse was a Civil War hero.

Perhaps the most scandalous statue of America's first president.

The "lovely red Vega" of the legendary record-settling pilot.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

At 207 feet, one of the world's longest continuous escalators.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Millions of dollars worth of sculpture decorate this Iowa city center.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

This zombie-themed restaurant stands out in the heart of corn country.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.