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Taughannock Falls in Trumansburg, New York, has a drop of 215 feet--the highest falls east of the Rocky Mountains. This areal photo shows what a "hung valley" looks like. The Finger Lakes, created by retreating glaciers, has many such falls and other interesting geological features throughout the region.
Letchworth State Parks middle falls (one of three) on the Genesee River in western New York. Area includes "pavilions, picnic tables, a playground, hiking trails, two large swimming pools, cabins, campsites for tents, trailer sites with dumping stations, and horse-riding trails"