The subjection of patients and medical staff to environmental stress is an important but neglected aspect of healthcare design. This article argues that, in addition to the inevitable stresses associated with being ill and having to wait for treatment, many existing healthcare spaces also inadvertently subject both patients and medical staff to two avoidable sources of stress: isolation from nature, and lack of perceptible change. The research presented demonstrates how three low-tech elements--the wind, foliage, and translucent glass--can be combined to address this problem in four common types of healthcare space in which patients are routinely required to wait for long periods: waiting rooms, examination rooms, outpatient treatment suites, and hospital inpatient rooms. [ABSTRACT FROM AUTHOR]