Visiting forests and nature reserves for recreational purposes Frequency and destination of holidays and short holidays / leisure outdoor activities in the Netherlands / having one or more dogs / other activities like visiting relatives and friends, going to the beach, visiting forests and other nature reserves, and sporting events / frequency of visits to forests and nature reserves in the neighbourhood, by which means of transportation, and accessibility / frequency of visiting forests and nature reserves outside direct neighbourhood / frequency of different activities during visits to forests and nature reserves / use and preference for particular facilities in forests and nature reserves / preferred type of forest and nature reserve / influence of weather and season on visiting forests and nature reserves.Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ education/ consumption of durables/ organizational membership