アメリカ内務省さんのインスタグラム写真 - (アメリカ内務省Instagram)「A rock carried away by the churning Colorado River. Flecks of dirt scattered by the winds. Erosion and gravity doing their work with patient deliberation. Cutting and carving the land over the course of 6 million years, revealing rocks formed and buried over 1.8 billion year ago. Visiting #GrandCanyon National Park in #Arizona is about appreciating time as much as size. Looking across its vast expanse and down into its deep channels, everyone starts to imagine the process and are quickly overwhelmed by the sense of the time it took to create this natural wonder. Photo @GrandCanyonNPS by #NationalPark Service. #travel #FindYourPark #usinterior」12月4日 1時32分