The skyline gondola is a fun ride and the view is stunning. The lines do get long so get there early or pre-order your package. There is dining (the fast food restaurant is mediocre) and having a drink in the lounge near a window is quite nice.
For us, going back at night for the Stargazing feature was the best part. Sounds simple but it was well set up with plenty of telescopes all pointing at different objects in the sky. Our host(s) was full of information and very personable. They gave us plenty of time to view everything. It was so quiet once all of the crowds were gone. And the night view of the region was quite nice as well.
And, in the end, there was hot chocolate! A very nice way to spend an evening. Highly recommended.More