We visited the National Bonsai & Penjing Museum at the National Arboretum, reputed to hold one of the finest collections of miniature masterpieces in North America, with bonsai originating from Japan and penjing from China. For a description of penjing, see http://en.wikipedia.org/wiki/Penjing

This is the Japanese garden, which I remembered from a visit years ago and wanted to see again, but unfortunately it was closed when we were there. Also, it was very windy when I took this ;-).

California juniper, in training since 1967, posted earlier: