1) Patapsco Valley State Park
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Top 10 Things to Do in the Washington, DC Capital Region: Take a Hike at Great Falls Park
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Great Falls National Park, McLean (close to DC), Virginia.
6 Great Swimming Holes Near Washington, DC Washingtonian MOST BEAUTIFUL: Cunningham Falls State Park -- The falls can be reached via an easy half-mile hiking trail in the park, which also boasts a lake with two swimming beaches. The northern bea
cascade lake water park maryland md-From secret waterfalls to crazy rope swings, these are the 5 best places to swim around DC