009738 01 Location USA Environment Activity America American Beach Characteristic Concept Conservation Environment Environmental Fluid Geographic Geography Homo Homo Sapiens Industry Lake Lakes Land Landscape Landscapes Liquid Location Massachusetts Nature North America North American People Person Physical Matter Place Pond Recreation Sand Beach Scenery Scenic Season Seasons Subject Substance Summer Tourism Tourist Tourists Travel Traveler Traveller United States US USA Vacation Visitor Walden Pond Water When 20070729 Frans Lanting USA Frans Lanting US6 001 © Frans Lanting Walden Pond on busy summer weekend Massachusetts