Research shows that elderly persons will remain healthier if they have ac-cess to an outdoor environment suited to their special needs all around theyear. The main medical reasons for outdoor activities relate to the upkeep of physical mobility and muscle mass; the preventive effect on acute coronary diseases; and the impact of natural daylight on hormones, emotional tone, aswell as vitamin-D effects on skeletal bone structure. Other benefits fromoutdoor activities include the maintenance of a neighborhood network, espe-cially for persons who lack close relatives. The paper focusses on what isknown about the outdoor habits of elderly persons, and what might be im-plied from these studies for the design of outdoor recreational areas.Data will be presented from two Swedish studies on elderly carried out bythe authors. In the first study, 500 persons aged between 60 and 70 wereinterviewed in their homes about matters relating, amongst others, to ac-commodation, work, leisure, health and economy (KUller, 1988). With theaim, in particular, of elucidating the importance of the environment, indi-viduals were selected from five different localities, an inner-city area and asuburb of Malmo, a district in Karlskrona and one inland and one coastalarea in the Karlskrona region. This study was later replicated in the UnitedKingdom by Mikellides and Willcox (1987 ) and in Turkey by 1mamolu,Kuller and Imamolu (1989 ). This makes it possible to includes cross-cultural data. The second study, aimed at the same topics, comprised 116women aged between 63 and 65 in MalmO ( Kuller and Steen, 1988 ). Datawill be presented which focus on the outdoor activities, psychological well-being, and health, during the different seasons of the year. Special emphasiswill be put on climatic factors like outdoor temperatures, availibility ofnatural dayligth, and access to green areas in the neighborhood.