Chicago, Illinois, is situated in the Midwest region of the United States and is known for its extreme weather conditions, with hot summers and cold winters. The city is located on the shore of Lake Michigan, which provides a vital source of freshwater and supports a variety of aquatic life. The Chicago River flows through the city and connects to the lake, creating a unique hydrology system. Outdoor recreation opportunities include kayaking, paddleboarding, and fishing on the lake and river. The city is also home to numerous parks, including Millennium Park and Grant Park, which offer hiking and biking trails, as well as outdoor concerts and festivals.