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

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The East Village tenement from the cover of Led Zeppelin’s 1975 album has a tea shop on the ground floor.

A hands-on traveling collection of the innovative devices of yesteryear.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

Unlock the secrets of the conjuring arts.

Steam out your ears for New Year's Eve.

Come for the waffles, stay for more waffles.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

A collaborative art project that transformed a neighborhood in NYC's Queens.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Set sail on a small scale.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The first museum in the United States dedicated entirely to posters.

The mysterious image is believed to show Edward Hyde, 3rd Earl of Clarendon, in a beautiful blue dress.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

Townhouse facade doubles as an RMS Titanic Memorial.

A hidden "place of interment for gentlemen."

A hidden three-foot-wide house separates these two regal churches.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

Perhaps the most spectacular grotto along the Algarve coastline.