Elevated freight railway turned wildly successful urban park.

Red frames showcase remnants of one of New York's original subway stations.

The most confusing clock in New York.

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

A hidden "place of interment for gentlemen."

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

There are owls with glowing eyes in Herald Square.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An ancient Egyptian temple in the middle of Madrid, Spain.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

The private island of Yale's elite Skull & Bones society is kind of a dump.

This tiny little island has, as the name says, just enough room for its single house.

A castle built for love, and abandoned due to heartbreak.

A dilapidated dock tells the story of Titanic's missed arrival.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

A mass grave for victims of one of the city’s worst fires.

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 only two commuter aerial tramways in the United States.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.