This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This neighborhood grocery houses a treasure trove of Eastern European delights.

This semi-hidden Manhattan restaurant is based out of a loading dock.

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

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

A very classy 1920s-era bar right in Grand Central Station.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

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

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

A collection of haunted objects and macabre oddities under one roof.

A new kind of theme park for adults off the Las Vegas Strip.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

The best Tiki bar in Las Vegas.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

An eerie collection of the surviving structures from a past celebration of the future.