For Pittsburgh-area courses, Moraine State Park and Deer Lakes are both elite championship courses.
Moraine State Park is a big state park with biking, hiking, and a big lake with swimming near the disc golf course.
Deer Lakes has a nice playground and even a mini water park.
Seven Springs Mountain Resort is a little over an hour east of Pittsburgh, has a great ski-hill disc golf course, and of course has more resort-type amenities with awesome state parks nearby.
And, Pittsburgh has a dozen or so really neat museums and sports and cultural attractions that have continued to impress me since I moved here 1.5 years ago.