The first Reference Garden, the Dancer’s Garden, is the crown jewel of the University’s conifer collections. The garden’s location had long been the only green space between two buildings on the main campus; Halsey Hall and Calvin Hall. For years the green space between these two buildings was known as PI Hill (poison ivy) and was viewed as an embarrassment by the university. Starting in the fall of 2011, the landscape services team received permission to install a conifer garden in this area. The landscape services team began by removing all the groundcover and seven trees. They graded the slope slightly and installed four semi-loads of limestone. This stone accentuates the topography of the site and replicates a natural bluff landscape. The garden features a waterfall which attracts both avian and human visitors during the summer. The garden includes 16 genera (four of which are deciduous), comprising 31 species, and 46 cultivars. Notable specimens include a Picea mariana 'Wellspire' that was salvaged from the original conifer garden that was flooded in 2008 and a Pinus strobus, 'Witches' Broom' found on campus.