Kenilworth Park & Aquatic Gardens is a National Park Service site located in the north eastern corner of Washington, D.C., and the Maryland state border. Nestled near the banks of the Anacostia River and directly south of the Baltimore Washington Parkway, Kenilworth Park & Aquatic Gardens preserves a plethora of rare waterlilies and lotuses in the cultivated ponds near the river. The park also contains the Kenilworth Marsh, the only remaining tidal marsh in Washington, D.C.