New Hope is a wonderful little town within striking distance of Philadelphia (and also New York). Good for a day or an entire weekend, New Hope has cute inns, good restaurants and art galleries in town. Further afield are some wineries and nice biking or walking along the river towpath (on the New Jersey side). Many of the restaurants in town are BYOB and you can grab some wine at one of the wineries or at a wine shop in New Jersey.
A little further to the northwest is Nockamixon State Park, where you can rent a boat.
The below map shows New Hope and the surrounding area. Have fun! And if you go, please post here and let us know how your time in New Hope was.
Bucks County Tourism Info for New Hope and Lambertville
Pennsylvania Tourism Info for New Hope
Delaware & Raritan Canal Towpath info (for biking or walking)