The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Illegal drag racing two stories beneath Chicago’s streets.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

To find the "unicorns of the deep" you've got to go downstairs.

Home to a protest movement, a bombing, and a dramatic change in labor history.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

These pretty kitties killed and ate as many as 135 railway workers.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

The legendary court where emerging basketball players gain their street cred.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Cryptic messages embedded in the New York City sidewalk.