Wet on the way from Washington to Wilmington

The US Capitol from the US National Botanic Garden

After a few fun and interesting days in and around Washington DC I'm sitting on the Amtrak Acela service to Wilmington, Delaware - though as I type we're at Baltimore station. It's pouring down, a warm and very wetting rain, and my attempt to see the sights of the National Mall this morning have left me very damp. Unfortunately this train is air-conditioned. The horticultural highlight of the Mall is the US National Botanic Garden, in its prime location just below the Capitol. There is a great native plants garden, some very welcome conservatories and the Bartholdi garden (above) has some excellent lush tropical planting.