The famous millennium park holiday tradition which features Holiday Sing-Alongs with Chicago’s Best Choral Groups is scheduled from November 23 through December 21. Chicagoans and visitors are invited to Cloud Gate, to hear the beautiful voices of a variety of choral groups and participate in a holiday sing-along.
The events will begin at 6 p.m.; located at AT&T Plaza the admission is free of charge. Individuals will be invited to hold holiday candles; this reflection of candles will be seen in the stainless steel of Cloud Gate. Even Complimentary peppermint hot chocolate, peppermint mocha, and Christmas blend coffee will be available, courtesy of Starbucks. After the event visitors can skate at Millennium Park’s McCormick Tribune Ice Rink.
The schedules of caroling at cloud gate are
1. November 23, 2008 (Friday) - Apollo Chorus of Chicago
2. November 30, 2008 (Friday) - Chicago Gay Men’s Chorus
3. December 7, 2008 (Friday) - Bella Voce
4. December 14, 2008 (Friday) - Chicago Mass Choir (Gospel)
5. December 21, 2008 (Friday) - Chicago Children’s Choir
More than 817 acres of the park was burned in a devastating fire, destroying the bird sanctuary. The park was repaired and restored with some areas still closed for public. 
Millennium Park has a Cycle Center which is a heated and air conditioned indoor bicycle parking facility built by the city of Chicago and now sponsored by McDonald's hence now named as McDonald's Cycle Center. 
The Botanical Building is one of the largest wood lath structures in the world. It has many tropical plants and exotic seasonal flowers in this lovely space. A Lily pond is situated to the south of this building.