Truly a spectacular museum. There is a bundle you can purchase of the space needle and museum together.
Want to get out on a local hike? Poo Poo Point has an excellent view of Mount Rainier. It is on the steeper side and be prepared to get there early to get parking.
An excellent local hike. You can also do Little Si for a shorter, less steep hike.
Impressive falls near the reception site. Short hike to a few different observation points.