Recreational Demonstration Areas
...that the forty-six Recreational Demonstration Areas, built as model parks near urban areas in the United States during the Great Depression, later became national and state parks, and in one case, Camp David?
...that the forty-six <b id="mwCKw"><a href="./Recreational_Demonstration_Area" id="mwCK0" rel="mw:WikiLink" title="Recreational Demonstration Area">Recreational Demonstration Areas</a></b>, built as model parks near urban areas in the <a href="./United_States" id="mwCK4" rel="mw:WikiLink" title="United States">United States</a> during the <a href="./Great_Depression" id="mwCK8" rel="mw:WikiLink" title="Great Depression">Great Depression</a>, later became <a href="./National_Park_Service" id="mwCLA" rel="mw:WikiLink" title="National Park Service">national</a> and <a href="./State_park" id="mwCLE" rel="mw:WikiLink" title="State park">state parks</a>, and in one case, <a href="./Camp_David" id="mwCLI" rel="mw:WikiLink" title="Camp David">Camp David</a>?