The Dumbarton Oaks Gardens and Museum-named by National Geographic as one of the Top Ten Gardens in the world alongside Versailles and Kew-is a 16 acre 19th century Georgetown estate. The gardens were restored by renowned landscape gardener Beatrix Jones Farrand in the 1930s, and are one of the best example of American neo-classicist landscape design in the world.  Full of terraces, arbors, fountains, pools, and flowering trees, it is a must-see for any fan of garden design.  The house also contains a small but well-curated collection of 1,500 Byzantine artifacts maintained by Harvard University. Check website for hours as they change with time of year and weather.

doaks.org