Possible relics of the ancient Roman city are hidden in this restaurant's façade.

One man's swirling six-acre monument of stone.

A library of only unpublished manuscripts.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

The first high-tech company in the valley that actually worked with silicon devices.

The Internet Age began with a transmission from this biker bar.

This small monument to the great inventor contains a time capsule and a Wi-Fi hotspot.

An eatery within a Bay Area Buddhist temple pulls off all your favorite Vietnamese classics without the meat.

Joe Minter is only doing the work of God in his yard, he says.

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

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

Prove you deserve to be fed by Kenny Shopsin.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

Walk over a 150 year old manhole.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

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

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

An unassuming secret door once led to a legendary watering hole.