Lawrence Halprin, a pre-eminent landscape architect of the 20th century, is renowned as a designer, educator, and innovator. Now, three exemplary works by Halprin are threatened by bulldozers and neglect. These works include the sunken sculpture garden and fountain at the Virginia Museum of Fine Arts (1976); Denver's unique linear urban promenade, Skyline Park (1973); and possibly the Bicentennial project, Heritage Park (1976) in Fort Worth. These landscapes suffer from poor maintenance that has led to demolition/redesign proposals at these sites.