The Lake Michigan is with 58,000 square kilometers the third largest of the Great Lakes. The lake is about 500 km long and 190 km wide. Even on top of the highest skyscrapers of Chicago you can not see the opposite shore.
The Chicago River gave the city its name. Originally, the river flowed into Lake Michigan. As the fast-growing city dumped its wastewater into the river, Lake Michigan was polluted and the water of the lake could no longer be used as fresh water. So the direction of flow was reversed in 1900. Since 1990 the river is relatively clean.
The "Crown Fountain" is a Water-Video-Sculpture. The Spanish artist Jaume Plensa has recorded tapes of 1,000 citizens of chicago. Now they flicker as movies on two giant Video blocks.
The "Grant Park" has the same meaning for Chicago like the Central Park for New York. The park was named after the Civil War General Ulysses Grant in 1901. The Park was built in 1844 and was called "Lake Park". If you have the chance go and visit the famous "Grand Park Music Festival".