It certainly is possible to provide a "healing environment" in an urban setting.  Look at how these hospitals across the country were able to do so: Regions Hospital, St. Paul, MN Bronson Methodist Hospital, Kalamazoo, MI UCLA Westwood Replacement Hospital, CA A number of studies have examined how gardens, artwork, atrium spaces and other features can provide a "healing environment," even in urban settings: Happy by Nature Atria for the Ailing Comfort in the Healing Garden Environmental Design