This tower commemorates the spot where George Washington hoisted the Grand Union flag.

A tiny town in an empty lot was the work of a local eight-year-old.

In 1898, a New England storm that claimed more than 400 lives created this brand new stretch of shoreline.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A crumbling hospital from the 1850s on Roosevelt Island.

One of only two commuter aerial tramways in the United States.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

According to folklore, Vermont's slanted windows were installed to keep witches from flying into the house.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

A gardener's enduring labor of love is spread throughout a small Vermont town.

Driftwood dinosaurs lurk within trees covered in a rainbow array of avian abodes.

The place where the great marine explorer first learned to work underwater is not where you'd expect.

The Sun King's military models, saved from the Louvre.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

A surrealist timepiece by the artist of melting clocks.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A public urinal so pretty, it was declared a national monument.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

This statue honors the thousands of Allied avians that served and died for France during World War I.