Guess I'll find out if it deserves the name Windy City

If a person were going to be in Chicago for the first time for, say, 6 hours and possibly a few evenings, in February, what might one do? Sears Tower? Field Museum? Pizza?

ETA: Also, if a person had basically the entirety of the English sci fi and fantasy literary canon at one's fingertips, what might one try next? Short stories and compilations are a personal favorite.