1. Skydeck Chicago is located on the 103rd floor of the iconic Willis Tower (previously known as Sears Tower) in Chicago. It features breathtaking views of the city and surrounding landscape - on a clear day, visitors can see up to four states!

One of the most interesting features of the Skydeck is \"The Ledge,\" a glass balcony that extends out from the side of the building. Visitors can step out onto the glass floor and look straight down at the street below - it’s not for the faint of heart!

In addition to The Ledge, there are interactive exhibits that showcase the history and culture of Chicago, as well as the engineering and architecture behind the building itself.

2. Skydeck Chicago is open 365 days a year, from 9am to 10pm (last entry at 9pm). The phone number for the Skydeck is (312) 875-9447.

3. To visit the Skydeck, tickets can be purchased in advance online or in person at the ticket counter. General admission tickets cost $26 per adult, $19 per child (ages 3-11), and $21 per senior (ages 65+). VIP tickets are also available for an additional fee, which include access to a separate entrance, express elevator, and other perks.

The Willis Tower is located in the heart of downtown Chicago and is easily accessible via public transportation (bus and train) or by car. There is also a parking garage on site for those who prefer to drive.