I went to the Cloisters when i was in NYC last summer and was underwhelmed, but i may go again. Oh yeah, Ellis Island, classic tourist site, should do that. Museums are of the good, and i didn't go to the Frick or the Morgan last time, so those are definite options. Ye gods i don't need any more books. (Honestly, i'm a library whore. I read a book and 99 times out of a hundred i have no inclination to reread it, and 999 times out of 1,000 i don't want to own it.)