This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

Hot Doug's "Hot Dog" Stand.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

A science teacher's dream.

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.

Lie in a hammock where George Washington stood.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

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

An artist's cute bronze subway sculptures belie his violent artistic past.

A graffiti Mecca welcoming artists from around the world.

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

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

Visit the monolithic tomb of America's most famous general.

A Manhattan Episcopal church with an eerie underground crypt.

Little Red Lighthouse under the George Washington Bridge.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.

The celebrated eyesore created by starry-eyed sweethearts.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A museum marks and documents the site of the Titanic's launch.

The lake that fills and empties itself at random.

The atmospheric road was never meant to be so creepy.

Northern Ireland's Brobdingnagian stepping stones.