The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An artsy hidden staircase leads to breathtaking views of San Francisco.

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

A hidden "place of interment for gentlemen."

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

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

A reminder to choose water over wine since 1888.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

New York City's only preserved family home from the 19th century.

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

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

The site of the deadly Triangle Shirtwaist Factory Fire.

New York City's smallest piece of private property.

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

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The most confusing clock in New York.

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

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

There are owls with glowing eyes in Herald Square.

What happens here stays here – unless it affects the whole world.

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