Hey, what's that over there on the other side of the river? It's New Jersey!
Visit Lambertville, the other New Hope.
Lambertville, New Jersey Chamber of Commerce
Ted Stiles Preserve/Baldpate Mountain is a nice hike. The Howell Living History Farm is on Pleasant Valley Road.
Trail Guide - Ted Stiles Preserve at Baldpate Mountain - NJ Trails Association
Then there's the other part of Washington Crossing SP.
Princeton is a nice day trip.
Best Princeton Attractions and Actvities: Top 10Best Attraction Reviews
There are some nice shops and restaurants there too. On the way home, be sure to stop in Grover's Mill and see the War of the Worlds Monument.
Van Sant Covered Bridge is about 1 1/2 miles west of Bowman Hill Tower.
If your up by Lahaska, Peddlers Village, late spring through late summer, stop by Carousel Lavender Farm on Mechanicsville Road.
CAROUSEL FARM LAVENDER