The world's largest piece of copyrighted artwork.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

A museum celebrating the Victorian obsession with hair art.

At 207 feet, one of the world's longest continuous escalators.

Home to items never before seen by the public.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"

This playground sculpture of an icon from the past is dedicated to the children of the future.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A speakeasy takes on Chicago's drinking culture.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

Community bookshelf of 25-foot-tall book spines.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

A semi-scholarly approach to sex.

An experimental, community court opened in 2000 takes a new approach to youth offenders in south Brooklyn.

A modern zoetrope on the New York City subway.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

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