Fjaðrárgljúfur Canyon, Iceland
The image is photoshopped. The orange sky and the the mountain peak in the background were added through digital manipulation.
Original image can be seen in Pixabay: external link
The canyon was used as the location for the Game of Thrones, first episode of Season 8 - the dragon flight scene when Jon and Daenerys fly the dragons together for the first time.
Source: external link
Google Street View: external link