Every spring, the Bethesda enclave of Kenwood hides in a cocoon of soft pink and white puffs, as the neighborhood's cherry trees come into full bloom almost overnight.
Beneath the serenity of the cherry blossoms, Kenwood is transformed from a quiet neighborhood of about 240 homes into a horticulture hotspot. This year, more than 30,000 people will stroll Kenwood's tree-lined streets in search of the perfect cherry blossom view. They come to Kenwood hoping to avoid the morass of tourists in Washington, D.C.'s Tidal Basin.
http://www.gazette.net/stories/040407/kensnew220229_32339.shtml
Well, I guess it's not "really" a secret, but it's another option rather than going into DC.....