Pittsburgh has a lot of great neighborhoods that are worth exploring. Just ask for the main street of Shadyside (higher end retail), Oakland (architecture and univ. campuses), The Strip (old school market district), Downtown (urban retailers and dept stores), Squirell Hill (liberal neighboorhood). You could probably waste an hour in each neighborhood just walking around. Other Pittsburgh musts - the incline, primantis, warhol museum,the point, heinz stadium, pnc park.