With BandOfAmerica card, I can visit museums for free at 1st weekend every month. I’ve made a google map pinpointing these museums.
For details of this Museums on Us® program from BankOfAmerica, check here.
11/30/2016 Update: I found that an official map website has been set up by BoA, finally!! Thus my old map becomes stale and useless.. 🙂
I’ve also made a map locating all national parks in US before (may not include all recreational area or things of the sort). Check that out as well if you are interested.