Hillwood's wildflower gardens are a sweet-smelling delight © Barbara Noe Kennedy

Hillwood Estate and Gardens The 13 acres of magnificent floral gardens surrounding cereal

heiress Marjorie Merriweather Post’s gracious manse give visitors a taste of how the one percent might live. Each formal garden is designed as an outdoor “room,” with a progression leading from the rose garden, to the French parterre, to the Friendship Walk and so on. The gardens put on a spectacular, ever-changing show throughout the year, though spring is naturally the most breathtaking. Join a seasonal tour, or take in the blooms from the café terrace. US National Arboretum Some of the best cherry trees beyond the Tidal Basin reside at the US National Arboretum, where 446 acres of gardens offer a full dose of spring and very few tourists. Pick up a brochure at the arboretum and go on a self-guided tour to discover such diverse varieties as the early flowering “Dream Catcher,” the mid-season flowering “Pendula” (aka the weeping cherry), and the Yoshino, cultivated from cuttings from the original Tidal Basin beauties. Take the 40-minute tram tour for an overview.