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

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A bit of retro transportation flair preserved in the world's largest department store.

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

Bowl in splendor, if you're lucky.

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

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

Home of Philip Johnson, one of the 20th century's most influential architects.

The loneliest island in New York.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Glacial erratic or man-made dolmen? It probably wasn't druids.

On this Polish road, an optical illusion makes cars seem to roll uphill.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

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

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A fantastic castle rumored to be the birthplace of King Arthur.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.