Sky View Cafe

The Columbia center is 933 feet high with 76 floors. The Sky View Observatory is at the 73rd floor. Its much taller than the Space Needle which is 605 feet tall. You can get 360 panoramic views from the top which is absolutely amazing!

Yes, it's pretty much free space once you're up top, besides the bar

Yes

Yes you can just go there but there are a lot of coupons online

No

Yes, the tickets are good for multiple entrances on the same day. We had visited there one and a half weeks back. However, to validate that you have to ask the gentleman at the desk in the viewing gallery to imprint the ink stamps on your hands. The ink stamp can be shown to the entryway at the bottom of the building on your subsequent entries.

Students with ID: $9.75.

I'm not certain