Rugged moss-covered mountain slopes under a deep blue sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304616/free-photo-image-abies-adventure-buildingFree Image from public domain licenseMarple Bridge, United Kingdom. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298921/free-photo-image-airplane-smoke-trail-airFree Image from public domain license