A threatening cloud over a distant mountain range. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3290855/free-photo-image-adventure-alps-cc0Free Image from public domain licenseBlack and white below shot of building glass architecture with cloudy sky in Soho. Original public domain image from… https://www.rawpixel.com/image/3289816/free-photo-image-architecture-building-bunkerFree Image from public domain licenseUtah Lake State Park, Provo, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3337475/free-photo-image-apparel-backpack-bagFree Image from public domain licenseA valley between low mountains in Metsovo. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3288153/free-photo-image-cc0-cloud-pictures-imagesFree Image from public domain licenseA bleak shot of white mountains over a dark treeline on a cloudy day. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3291179/free-photo-image-abies-cc0-cloudFree Image from public domain licenseCrescent, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3290882/free-photo-image-cc0-cloud-pictures-imagesFree Image from public domain licenseClouds envelop a rugged mountain with a coniferous forest at its base. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3293903/free-photo-image-abies-banff-canadaFree Image from public domain licenseStormy sea and a lighthouse from The British Empire, Its Geography, Resources, Commerce, Landways and Waterways published by… https://www.rawpixel.com/image/573342/stormy-seascape-drawingFree Image from public domain license