Taughannock Falls State Park
Taughannock park road on rt.89, just south of the village, via well marked road from rt.96. lake swimming, boating rentals are available, hiking, picnicking, and camping. take a pleasant, flat walk from the route 89 entrance to the base of the falls, the tallest 215 feet east of the mississippi. there is a more vigorous hike around the edge of the falls basin. for instant gratification you can drive up the road connecting with route 96 and pull off to visit an overlook to the falls. there are often summer concerts here on thursday evenings. note that entrance to one state park gets you admission to all state parks for the day.
The Camp House
The biggest most beautiful house in Trumansburg, built by local notable Hermon Camp, an officer in the War of 1812, local postmaster, and founder of the local bank. Not open to the public, since people still live there, but it's occasionally open for charity house tours or events. Now surrounded by trees, but when it was built, everything'd been cut down and farmed and you could see all the way to the lake.