The "plyscraper" is the world's tallest building made predominantly out of wood.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

A century-old magnolia tree is the only living landmark tree in New York City.

A monument stands to the famous suffragist who penned the declaration for women's equal rights, including the right to vote.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

There are owls with glowing eyes in Herald Square.

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

Unusual books about food and drink abound in this 19th-century New York townhouse.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

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

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

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

World's largest collection of serial killer artwork and other macabre exhibits.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Inside this clubhouse is a cinephile's paradise.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Nikola Tesla's former home contains an homage hidden from plain sight.