アメリカ内務省のインスタグラム(usinterior) - 3月16日 10時01分

At #SouthDakota’s #Badlands National Park, the weather can be just as amazing as the landscape of sharply eroded buttes, pinnacles and spires surrounded by a mixed-grass prairie ecosystem. Pictured here are #mammatus clouds -- which form when cold air within the cloud sinks toward Earth, creating rounded, smooth and pouch-like shapes on the underside. While mammatus clouds often accompany severe thunderstorms, the clouds themselves are harmless and usually form after a storm has passed. Photo by Cathy Bell, #NationalPark Service. #usinterior #FindYourPark #weather #travel

[BIHAKUEN]UVシールド(UVShield)

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