Franconia Falls, White Mountain National Forest
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The brook along Franconia Falls trail features a number of water slides and swimming holes of various sizes, capped off by a narrow, 20-foot long granite chute shooting into a rectangular pool. From the Lincoln Woods parking lot, it's an easy, three-mile hike to the falls that starts off with a suspension bridge spanning the Franconia branch of the Pemigewasset River. The area is open year-round and doesn't cap the number of visitors, so expect crowds in the summer.