This innocent-looking townhome is actually a subway exit.

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

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

This abandoned subway station can still be seen on regular commuter trips.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

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

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Where the legendary Orson Welles got his theatrical start before "Citizen Kane."

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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

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

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

This Canary island is a quintessential example of nature’s beauty, and its unbridled fury.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

The hike to this stunning waterfall on a black sand beach is not for the faint of heart.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

All of the Malaysian sweets at this shop are made daily with a whole lot of love.

Cooks at this tiny takeout spot grind their rice flour in a stone mill each morning for perfect cheung fun.

Home to some of the last true noodle artisans in New York.