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Potomac, A History of the River and the Land
The Potomac River, the dominant geological feature of Montgomery County, has also played a dominant role in American history. It was the first interstate waterway in North America, the spawning ground for the Constitution, and a protective barrier in the Civil War. To travelers today, it is a time tunnel to 250 million years of history. Learn that history from Jim Johnston and then walk along the river yourself to see the Potomac in a new way.

Apr 6, 2021 02:00 PM in Eastern Time (US and Canada)

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