Millennium Park, or as it is known as the Millennium Park, is a public park, located in Chicago, Illinois, USA, that was opened in 2004, and cost nearly $500 million. This park is considered one of the most important landmarks in Chicago, and is a famous entertainment and tourist center, as it includes many landmarks and works of art, the most famous of which are the Cloud Gate, the Crown Fountain, and the Jay Pritzker Theater, which was designed by the world famous architect Frank Gehry.