The land between the Urban Ecology Center and the Milwaukee River has been growing greener as a result of the vision of Pieter Godfrey. Godfrey donated four acres of his land adjacent to the river and the UEC to the center to help create the Rotary Centennial Arboretum, which opens this week. The 40-acre stretch of land encompasses Riverside Park, the UEC, a piece of the Oak Leaf Trail and river frontage, and is a refuge for wildlife, nature and urban green space.