Knowles Marshes is a swamp located in Prince George's County, Maryland. It appears on the Laurel USGS 7.5-minute topographic quadrangle. The nearest populated place is Sandy Hill Acres, approximately 1.7 miles to the SSE.
Prince George's County · Maryland
Knowles Marshes is a swamp located in Prince George's County, Maryland. It appears on the Laurel USGS 7.5-minute topographic quadrangle. The nearest populated place is Sandy Hill Acres, approximately 1.7 miles to the SSE.