Visit the monolithic tomb of America's most famous general.

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

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

An accidentally hidden library containing the ephemeral history of New York.

A legendary speakeasy bookstore returns from the brink.

Walk over a 150 year old manhole.

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

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

One of only two commuter aerial tramways in the United States.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A semi-scholarly approach to sex.

New York City's smallest piece of private property.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A modern version of the stone cairns built by the Inuit.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Historic site where Native American hunters once trapped and killed buffalo.

Hauntingly beautiful totem poles left by the Haida.