Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

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

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The home of the first American-born saint is one of the only curved buildings in New York.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Unrepaired walls from a 1920 anarchist bomb attack.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This taxidermy horse was a Civil War hero.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The mansion home of author Edith Wharton.

A 60-room castle constructed by a horse-racing heir.

This mural celebrates the early integration of a New Hampshire baseball team.

Murder scene memorialized in perpetuity by grisly obelisk.

Come for the gun-toting hillbilly madman, stay for the ice-cream loving basketball bears.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Former abode of notable poet, complete with literary references and stories of ghosts.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

The world's largest indoor go-kart racetrack is hiding in Connecticut.