A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

The site of the deadly Triangle Shirtwaist Factory Fire.

Cryptic messages embedded in the New York City sidewalk.

New York City's smallest piece of private property.

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

Rummage through this sunken ship, but leave your scuba gear at home.

Elevated freight railway turned wildly successful urban park.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This elaborate towering structure was once famed for its revolutionary height.

Dr Barnes' $25 billion private collection of art and arboretum.

Yo, Adrian!

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

World's first "penitentiary," meant to be humane, drove men insane.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.