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

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

The most confusing clock in New York.

The "Seinfeld" diner.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Salute the leader of the proletariat.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

One of the last Jazz Age "Wonder Theaters" in New York City.

Discover the taste of mold.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

Unrepaired walls from a 1920 anarchist bomb attack.

Rummage through this sunken ship, but leave your scuba gear at home.

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

Avoid gangster interaction while window-shopping.

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

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

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

Cryptic messages embedded in the New York City sidewalk.

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

Lie in a hammock where George Washington stood.

Plot your trip through the city on the sidewalk.

A very classy 1920s-era bar right in Grand Central Station.

Prove you deserve to be fed by Kenny Shopsin.