Chicago. City of the Big Shoulders. What started off as a small fur-trading settlement is today a bustling metropolis. Once considered the "hog butcher of the world, " "stacker of wheat, " and "player with railroads, " Chicago's colorful past remains hidden in the nooks and crannies of this wonderful windy city. Adventures await, from the glamourous to the gritty: Sip dirty martinis in an elegant, underground, 1920's bank vault. Paddle a kayak down the infamous Bubbly Creek of Upton Sinclair's The Jungle. While away an afternoon in a salt cave, or smoke a classic cigar in the oldest family-run tobacco shop in the U.S. Snorkel a 32-acre, limestone sheet shoal, one of the most biodiverse ecosystems in the Midwest. Dine outdoors in a 23rd floor, Beaux-Arts cupola overlooking the Chicago River. Whether you're an out-of-towner or a diehard Chicago dweller who thinks you've seen it all, these 111 hidden places are waiting for you to seek out and enjoy.