Years of archaeology, just chillin' by the water cooler.

The subtle science of a master molecular gastronomist.

A Bibliophile's Dream.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This shop for all your super spy needs hides an educational secret.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

Hundreds of antique bank vault locks on display in New York City.

More than 5,000 contemporary and "historic" mustards from around the world.

This collection of grinning ephemera has grown from basement to Brooklyn.

More than 8,000 drinking jugs say “Cheers!” to a guy named Toby.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A stairway to heaven, or to nowhere at all.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

Harlem park dedicated to compulsive hoarders killed by their own junk.

One kilometer of thick brass rod laid out before your eyes.

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

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Three-story slide through the New Museum.

Bowl in splendor, if you're lucky.

A legendary speakeasy bookstore returns from the brink.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.