I have more miles than I know what to do with and I am looking for some good uses of miles in 25k spurts. I have miles on all alliances so that is not a constraint.

Please recommend some of your favorite weekend (2-3 day) trips within the following constraints:

1) No beaches. If the location has a beach, that is fine, but not if it is the only good thing about it.
2) Preferably has a Starwood property.
3) Bonus points for interesting things to do (interesting = not only restaurants). Magnificent natural scenery is a plus.

Please include the season that is best in your opinion.

Thanks!

PS Flying out of NYC but it really doesn't matter as I don't consider 5-6 hours to be 'too much' for a weekend trip.

PS2: Given the season, skiing is an exciting option but I am a beginner so keep that in mind.