opening ceremony was sponsored by J.P. Morgan Chase & Co. The community around Millennium Park has become one of the most fashionable and desired residential addresses in Chicago. In 2006, Forbes named the park's 60602 zip code as the hottest in terms of price appreciation in the country, with upscale buildings such as The Heritage at Millennium Park (130 N. Garland) leading the way for other buildings, such as Waterview Tower, The Legacy and Joffrey Tower. The median sale price for residential real estate was $710,000 in 2005 according to Forbes, also ranking it on the list of most expensive zip codes. The park has been credited with increasing residential real estate values by $100 per square foot ($1,076 per m2). Features Millennium Park is a portion of the Grant Park, known as the "front lawn" of downtown Chicago, and has four major artistic highlights: the Jay Pritzker Pavilion, Cloud Gate, the Crown Fountain, and the Lurie Garden. Millennium Park is successful as a public art venue in part due to the grand scale of each piece and the open spaces for display. A showcase for postmodern architecture, it also features the McCormick Tribune Ice Skating Rink, the BP Pedestrian Bridge, the Joan W. and Irving B. Harris Theater for Music and Dance, Wrigley Square, the McDonald's Cycle Center, the Exelon Pavilions, the AT&T Plaza, the Boeing Galleries, the Chase Promenade, and the Nichols Bridgeway. Millennium Park is considered one of the largest green roofs in the world, having been constructed on top of a railroad yard and large parking garages. The park, which is known for being user friendly, has a very rigorous cleaning schedule with many areas being swept, wiped down or cleaned multiple times a day. Although the park was unveiled in July 2004, some features opened earlier, and upgrades continued for some time afterwards. Along with the cultural features above ground (described below) the park has its own 2218-space parking garage. Jay Pritzker Pavilion The centerpiece of Millennium Park is the Jay Pritzker Pavilion, a bandshell designed by Frank Gehry. The pavilion has 4,000 fixed seats, plus additional lawn seating for 7,000; the stage is framed by curving plates of stainless steel, characteristic of Gehry. It was named after Jay Pritzker, whose family is known for owning Hyatt Hotels and was a major donor. The Pritzker Pavilion is Grant Park's outdoor performing arts venue for small