Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Commemorating the spot where the famous scientist fed his pigeons.

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

There must be a pun in this haystack somewhere...

A hidden "place of interment for gentlemen."

Plot your trip through the city on the sidewalk.

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

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

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

A terrific purveyor of natural history objects and curios.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The most confusing clock in New York.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A semi-scholarly approach to sex.

The notorious headquarters of a corrupt political machine.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

The former hotel where Tesla invented the radio.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Red frames showcase remnants of one of New York's original subway stations.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

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

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

Elevated freight railway turned wildly successful urban park.