Memorial Lake is a great place to chill on a blanket or bike or walk. Swatara State Park has great hiking/bike trails. In Harrisburg: Midtown Cinema, Midtown Scholar bookstore, Suba (a great tapas place!), check out Harrisburg University's website for a concert calendar, great outdoor shows right beside the river in Harrisburg (in spring/summer). Get a fancy drink on the veranda at the Hotel Hershey. There are a couple of hiking/walking trails around the hotel. Great views of the park and the town from up there. Don't miss Central Market in Lancaster.