An indoor market that houses an array of great food (including Pennsylvania Dutch - their "shoofly pies" are a must-try!), crafts, and plants
The oldest continuously occupied residential street in the US, this would be a fantastic addition to a historical site-seeing trip to Philadelphia.
A day-trip to the former estate of Pierre S. du Pont to marvel at (AWESOME) botanical displays; plan in advance, timed tickets required!
A gorgeous 1800-acre gorge great for a casual hike.