Watching the aurora down in the Goldstream Valley. Lights from the homes on the hill, some purple at high altitudes (more in my article "What Causes the Aurora"), a brilliant night! Even after 11 years of aurora watching from Fairbanks, this still might be the best display I've ever seen. It's certainly in the top 3.
Near the Primrose region in Denali National Park.
Water running on the surface of the Black Rapids Glacier glistens in the evening light shortly before sunset.