These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Those belting out show tunes might not realize this piano bar marks the site where Thomas Paine died in 1809.

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

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

A terrific purveyor of natural history objects and curios.

Elevated freight railway turned wildly successful urban park.

A dilapidated dock tells the story of Titanic's missed arrival.

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

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

The former hotel where Tesla invented the radio.

The first piece of public art dedicated to LGBT rights.

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

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

The site of the deadly Triangle Shirtwaist Factory Fire.

The oldest living tree in Manhattan comes shrouded in sinister legend.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.