A historic Montreal market that was the city's agricultural hub for over century.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

100 massive sculptures in the Hudson River Valley.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

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

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Avoid gangster interaction while window-shopping.

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.

New York's southernmost subway station is whimsically wavy.

Once America's longest-manned military fort, now an abandoned hulk.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Lie in a hammock where George Washington stood.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The first piece of public art dedicated to LGBT rights.

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

There are owls with glowing eyes in Herald Square.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Mysterious 500-year-old tapestries depict a unicorn hunt.