Every holiday season in Washington, I look forward to escaping the winter cold by taking a quick tropical break at the United States Botanic Garden. The dry heat in the desert environment and the warm humidity in the lush tropical rainforest immediately transport you hundreds of miles away. The colourful orchids also have a way of brightening up any grey day! Of course, this year, there's not much winter chills to be escaped, but I still looked forward to visiting the indoor garden for another reason: the annual display of National Mall landmarks made out of dried plant materials in the Garden Court. I'm always amazed at how detailed the ...