These photos were all uploaded with our new iPhone app’s “Mammoth” filter, which seems to lend itself to shots of skies, shrubs and steel. To see more like them (or search for a particular filter from our app), try out a Flickr search of “flickriosapp:filter=mammoth”, like this.

Photos from Alissa Holland, Indigo Dreams, dreamscapesxx, eb78, Ben Goode, lestaylorphoto, and OverStuffedHobbes.