West Side park in Michigan City. I don't know if any of you are from around this area, but it's in great condition and has a good amount of variation. Just watch out for the bikers flying around like they own the place.
http://www.concretedisciples.com/skateparksdb/skateparks_display.php?id=2253
http://www.concretedisciples.com/skateparksdb/skateparks_display.php?id=2253