Sunset after a summer evening rainstorm. Nashua, NH.
One of my friends captured a shot of a complete rainbow about a block down the road from my house. By the time I got down there a few minutes later, the light had changed enough so that the rainbow was barely visible… but this was the view in the opposite direction from that same corner.
Specs: Samsung Galaxy S5, using native camera app. Post-processed in Adobe Lightroom 5 and Adobe Photoshop CC.