Dense woods near a jagged mountain range in Puerto de la Bonaigua. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287240/free-photo-image-abies-adventure-cc0Free Image from public domain licenseMan wearing headphones listening to music illustration. Free public domain CC0 image. https://www.rawpixel.com/image/9069953/image-music-note-person-cartoonFree Image from public domain licenseSwiss International Air Lines Airbus A330, location unknown, 18/09/2016. https://www.rawpixel.com/image/6112701/photo-image-public-domain-technology-skyFree Image from public domain licenseCrater Lake National Park, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3289779/free-photo-image-crater-abies-cc0Free Image from public domain licenseTanzaku hanging on bamboo, Japanese Tanabata festival illustration. Free public domain CC0 image. https://www.rawpixel.com/image/11727427/image-paper-flower-plantFree Image from public domain licenseBalance clip art, black and white illustration. Free public domain CC0 image. https://www.rawpixel.com/image/6725877/image-vintage-public-domain-blackFree Image from public domain license