Hike Denali. It's one of the best places on earth to hike. My girlfriend and I made it to Kahilma Pass before realizing that we weren't properly equipped to go much further. If you're the adventure seeking type, I highly recommend it. There's also the Alyeska tram ride that offers a panoramic view of the area if you're into the leisurely activity. The restaurant at the top of the mountain serves really good food. You can't get salmon any fresher than what they serve there. I highly recommend it.