New York's oldest and possibly grandest keeper of books.

The famous author's cottage hideaway.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

Peek through the gates at this oasis from the city, full of Old English charm.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

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

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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

A five-story homage to tea times past.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

England's most famous front door has an accidental doppelganger.

Home of one of history's most famous cartoonists just as he left it.

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

A boutique perfumery fashioned to look like a Victorian-era shop.