ALL visitors* (excluding groups) receive FREE access to the permanent exhibits of MPM on the first Thursday of every month during Kohl's Thank You Thursday. Admission is free, but we strongly recommend advance reservations.* Walk-up tickets are not guaranteed. The Milwaukee Public Museum, the largest natural history museum in Wisconsin and one of the largest in the region, provides a dynamic and stimulating environment for learning, with something to excite and challenge visitors with a diversity of interests.