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Physical Information
Location Northeastern Illinois, United States
Appearance The Lost Hero
Chicago is a city in Northeastern Illinois. It is the largest city in the state, and the third-largest in the United States, with 2.7 million residents. It's among the top five most economically powerful cities in the world, according to Forbes.

The Heroes of Olympus

The Lost Hero

Leo Valdez, Piper McLean, and Jason Grace visit the city during their Quest to Free Hera. They go to an underground mall owned by Medea, a servant of Gaea. Piper defeated Medea by combining potions that caused the mall to explode. Jason, Piper, and Leo escape on Festus.

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