Rocky Island from towpath Location: Great Falls of the Potomac National Park near Potomac, MD Year: 2008 Merckdigitals catalogue number: 06-50042 Comments:

Rocky Island river loop leads to Mather Gorge Location: Great Falls of the Potomac National Park - Billygoat Trail, near Potomac, MD Year: 2006 Merckslides catalogue number: 06-23799 Comments:

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