Rockhounding a rain gullet after heavy rains at Paradise Falls Herkimer Diamond locality in Middleville, NY, U.S.A.  Many of these crystals are alluvial, and wash out of the dirt after rainy weather.  Not many(if any) Herkimer Diamond localities have such abundant surface finds as Paradise Falls does.

Doing some light digging for Herkimer Diamonds at Paradise Falls in Middleville, New York, U.S.A..  These are alluvial deposits and crystals are found on the surface, just below the surface, and in the rock ledge in pockets.  Some footage of the waterfalls as well in this video.