Antietam Lake is a reservoir lake in Berks County located within the Antietam Lake Park about 13 miles from Reading. Surrounded by 643 acres of scenic park land, the lake provides a serene setting for picnics, fishing, hiking, biking, and just enjoying the peace and quiet. The history of Antietam Lake dates back to 1865, when the city of Reading bought a dam and gristmill that had been built on Antietam Creek, along with a majestic waterfall that flows over the 60-foot-high rock. The original Victorian brick valve house was erected on a stone foundation in the lake, with a flimsy wooden bridge connecting it to the shore. It is still standing, as is the charming 1880 caretaker's house.

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