Strybing, Enid A. Haupt and Deepwood

This 55-acre arboretum encloses 12 main gardens, each representing a different part of the world. Visitors can see more than 7,000 plant varieties that thrive in a climate of fog, wind and salty ocean air. A primitive plant garden, a cloud forest and a miniature redwood forest all take root in a landscape that sits atop sand dunes.

Enid A. Haupt Garden
Washington, DC

With its 30 million visitors each year, the Smithsonian offers multiple museums filled with priceless treasures. Many people don't realize that three of those museums are underground and atop their roofs is a unique living treasure--the Enid A. Haupt Garden. A gorgeous parterre garden sits at the foot of the Smithsonian castle while pink hibiscus flowers line the path to the Island Garden.

Deepwood Gardens
Salem, Oregon

Drivers whiz past Deepwood Gardens seemingly unaware of the inviting retreat tucked behind this estate's trees and greenery. With its intimate garden rooms, arbors and latticework, this secluded garden speaks of a calmer era. There's a scroll garden with a hidden signature, an ivy tunnel and a pastel tea garden.