This 25-acre estate, designed by landscape architect Willard Gebhart, overlooks Rock Creek Park in northwest Washington D.C. and includes a Georgian-style mansion designed by John Deibert in 1926 for Colonel and Mrs. Henry Parsons Erwin.

In 1955, cereal heiress Marjorie Merriweather Post purchased the property and renamed it Hillwood. The mansion was renovated to house her vast collections of imperial Russian and 18th century French decorative art. Thirteen acres of the estate were redesigned for her by a variety of landscape architects. This includes a French Parterre garden by Innocenti and Webel designed, to complement her collection of 18th century French furnishings and decorative arts; a circular rose garden with a curving pergola designed by Perry Wheeler (who also worked on the garden’s Friendship Walk); and a Japanese-influenced pleasure garden, representing a traditional interpretation of a mountain, built in miniature which was refined by Shogo J. Myaida.  Garden “rooms”, defined by hedges or large plantings include a putting green, greenhouses (with a dedicated orchid curator), cutting garden, lunar lawn, and vista terrace, in addition to 12 acres of woodlands.