US Department of the Interior @Interior
About 1.25 million years ago, a volcanic eruption created the 13-mile wide circular depression now known as the Valles Caldera. On sunset evenings, the orange reflections still channel the volcanic colors of the past. Pic of Valles Caldera National Preserve by Andrew Gordon https://t.co/nVVIpUK1Yl — PolitiTweet.org