Due to the beautiful topography, the entire coast from Shono-kawa River and westward was designated in 1955 as a major part of Wakasa Bay Quasi-National Park, and a part of the eastern coast was designated in 1968 as a part of Echizen Kaga Coast Quasi-National Park, and in August 3, 2007, the coast from Yura-gawa River and westward was separated from Wakasa Bay Quasi-national Park, and instead, the coast was combined with Oe-yama Mountain Range and became Tango-Amanohashidate-Oeyama Quasi-National Park, so there are three quasi-national parks here now.
その風光明媚な地形は、1955年に笙の川以西の全湾岸周辺にわたり若狭湾国定公園の大部分、1968年に東岸周辺の一部が越前加賀海岸国定公園の一部に指定されていたが、2007年8月3日に若狭湾国定公園のうち由良川以西が分離独立し、大江山などを加えて新たに丹後天橋立大江山国定公園となり、3つの国定公園を有することになった。