When was the last time you scuffed your shoes victoriously on a former Superfund site and at the same time considered modern sculpture? (Hey, when that sculpture was being made, this land was being polluted!) In all seriousness: go. This is like an entire new museum. Free shuttles are leaving from several YMCAs; check the schedule at iamsamcampaign.org. (Olympic Sculpture Park, 2901 Western Ave, 654-3100. 11 am—9 pm, free.)