Walk down Washington Avenue and check out The Shinery, Rebellion Brewing USA, Cedar Creek Winery or North 48 along with all of the shops and restaurants!
Check out the Milwaukee Art Museum, the Mitchell Park Domes, Milwaukee County Zoo, the Betty Brinn Children's Museum, or simply walk the lakefront. Stop for a drink at one of Milwaukee's many breweries: Third Space, Central Waters, City Lights, and of course the classics Pabst, Lakefront, and Miller. Just to name a few. Head to one of Milwaukee's beer gardens for some fresh air, food, and, you guessed it, more beer.
Been there done that with Milwaukee? Head up to Sheboygan. On the way check out the country's tallest flag pole. Grab some drinks at 3 Sheeps Brewery and then head to the beach and check out the remains of the Lottie Cooper, a ship that sank in 1894. Go for a hike on the beach and check out the sand dunes at Koehler Andrae State Park (or Terry Andrae according to to the Rinehart clan).
You can't go wrong with the Shalom Wildlife Zoo or the West Bend Labyrinth Gardens.