Chicago is known as the "Windy City". Some think this is because of the breeze that almost constantly. The city is located in the of Illinois on the shore of one of Great Lakes, Lake Michigan, which is the fifth freshwater body in the world. Chicago may also called the windy city because of the wind effect created in downtown by many tall buildings.

are an important part of Chicago's history. The skyscraper in the U.S. was built in the in 1884. At only 10 stories, it was for its time. The skycraper was eventually demolished. is the home of other famous firsts. It the birthplace of the refrigerated rail car, mail-order , the car radio, the TV remote control, the Ferris wheel, the first steel rail road, the planetarium in the Western Hemisphere. Chicago is also home to the first blood bank and the drive-in bank. It is also the home to Lincoln Park Zoo, the oldest public zoo in U.S. Maybe the windy city should be called city of firsts.

Chicago is the third most city in the U.S., after New York City Los Angeles. A little more than two and half million people live in the city that more than 100 neighborhoods. President Barack Obama used live in Chicago.

Nearly 40 million people visit every year. Many of them visit the Willis . Formally known as the Sears Tower, it is tallest building in the Western Hemisphere. It takes a minute to get up to the 103rd Skydeck thanks to some of the fastest elevators the world. From the Skydeck visitors can see states: Indiana, Illinois, Michigan, and Wisconsin.