Arethusa Falls are the largest waterfalls in the state of New Hampshire. The water is extremely chilly year 'round and feels great after a summer hike. LAT, LON lat=44.148, lon=-71.386(source: Topozone ) (accuracy: exact) To get here: Continue east on RT 302 and, just after the Dry River Campground and the Willey House, park at the Arethusa Falls parking area on the right. Pull off the road to the right and drive up the big hill and park near the railroad tracks, if possible. If the parking lot