Kenilworth Aquatic Gardens

The only aquatic gardens managed by the National Park Service in the country is a marvelous off-the-beaten-path destination in D.C. The Kenilworth marsh is all that remains of the vast marshlands that once covered the riverbanks of the Anacostia (before being dredged for development), and is the only place where you can really imagine the District before it became America's capital. The prime attraction are the cultivated ponds, full of waterlilies, but it's also a worthy destination for the riverfront trail, greenhouses, and birdwatching. The best time to visit is without a doubt on an early summer morning, when the waterlilies are in full bloom. Free summer garden tours are available Sa-Su 9AM & 11AM (Memorial Day-Labor Day).