According to Wikipedia - the free encyclopedia, Chicago is the seat of Cook County, Illinois, the second most populous county in the United States after Los Angeles County, California. It has less than 1% of its territory in DuPage County. It was founded in 1833, near a beaching between the Great Lakes and the Mississippi River basin. With about 2.7 million inhabitants according to the 2010 census, is the most populous city in the Midwest and the third most populous in the United States of America.           To get an idea of ​​the strength of this city, its international airport, O'Hare is the second busiest in the world and its GDP is the fourth largest among metropolitan areas in the world. Chicago is a center for business and finance and is listed as one of the world's top ten Global Financial Centres Index. Its inhabitants tend to call it "Chi-Town", "Windy City" (because of the wind) and "The most American of big cities." The city is reputed to be "a civilized place for civilized people," which earned more fame.           Upon arriving in Chicago, one of the first things to do is buy the CityPass, a bead passes giving access to the five main attractions of the city, besides being a pass which avoids wasting time in queues, the CityPass provides a saving of over eighty dollars per person, which represents a 50% discount. The attractions that are part of the CityPass are: Shedd Aquarium, an aquarium incredible over forty thousand species, the Sky Deck, which offers stunning views of the city at 103 stories tall, the Field Museum, which is one of the most important natural science museums in the world, the Museum of Science and Industry, chosen as one of the fifteen best museums in the world by Life Magazine, and the Art Institute of Chicago, which is the second largest art museum in the United States, with the largest Impressionist collection outside of Paris. All this with a single CityPass.           You can not go to Chicago, even in winter, without going to have some fun at the Navy Pier, built between 1914 and 1916, dropped several times and finally restored in 1976, Navy Pier (named after war heroes) that formerly was called Municipal Pier, is the amusement park of Chicago and found there are several attractions such as its famous Ferris wheel, where you have a wonderful view of the city. At the pier can also be found bars, restaurants, museum and a plethora of other interesting attractions.           Another must is to visit Old Water Tower, built in 1869 that resembles a castle. His role today is mainly historical, representing the strength of the city over the elements, because the tower was one of the few buildings that escaped the Great Fire, which began on October 8, 1871, lasted three days, reached an area nine square miles and caused the death of hundreds of Chicagoans. It was the most tragic event in American 19th century but, to compensate, reconstruction of the city allowed its complete renovation and made sure Chicago would become one of the largest U.S. cities. Exactly for this reason, one of the stars of the flag represents the great Chicago fire.           For those who are not afraid of height, a great ride is climbing to the top of the Willis Tower (formerly Sears Tower), which has 108 floors (some say are 110 stories), is the tallest building in North America and offers a stunning view of the city and its surroundings. It is one of the most popular attractions in Chicago and the queues are often quite large, therefore advise you to arrive early or have enough patience. The tower stands on the corner of Franklin and Adams, center, and admission is eighteen U.S. dollars, but the FastPass paying the visitor avoids queues and rises by an express elevator, saving much time on your visit. The observatory, named Sky Deck, located at 103. floor and closes when the winds are too strong. Lupércio Mundim Translation: Google translate