Dark blue smoke. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284913/free-photo-image-cloudy-night-sky-smoke-sea-darkFree Image from public domain licensePerson wearing hoodie. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3285177/free-photo-image-dark-scratched-glass-stalkerFree Image from public domain licenseAn empty suspension bridge leading to a dense forest. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284036/free-photo-image-tree-1800-1600-pathFree Image from public domain licenseMysterious foggy woods. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370181/free-photo-image-background-trees-dark-forestFree Image from public domain licenseHallowee, horror nature background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287233/free-photo-image-zombie-autumnal-cc0Free Image from public domain licenseA man hiding in the shadow. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284814/free-photo-image-hands-man-light-and-shadowFree Image from public domain licenseStonehenge in Salisbury Plain in Wiltshire, England. Free public domain CC0 photo. https://www.rawpixel.com/image/6031950/photo-image-public-domain-free-travelFree Image from public domain licenseStonehenge in Salisbury Plain in Wiltshire, England. Free public domain CC0 photo. https://www.rawpixel.com/image/6031937/photo-image-public-domain-free-travelFree Image from public domain licenseFree silhouette of man running in forest photo, public domain nature CC0 image. https://www.rawpixel.com/image/5908225/image-public-domain-tree-natureFree Image from public domain licenseŠumava National Park, Czech Republic. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3305493/free-photo-image-fog-apparel-cc0Free Image from public domain licensePeople, human with nature scenery photo, free public domain CC0 image. https://www.rawpixel.com/image/5921589/photo-image-background-public-domain-natureFree Image from public domain licenseWhite and black skull figurine on black surface photo. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3283566/free-photo-image-skull-death-blackFree Image from public domain licenseHintersee, Ramsau bei Berchtesgaden, Germany. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286495/free-photo-image-nature-winter-forest-public-domainFree Image from public domain licenseDead acacia trees petrified in time. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370239/free-photo-image-scary-trees-tree-darkFree Image from public domain licenseThe Flammarion engraving is a wood engraving by an unknown artist that first appeared in Camille Flammarion's L'atmosphère:… https://www.rawpixel.com/image/8717962/photo-image-art-vintage-treeFree Image from public domain licenseStreetlights glow on a walking path on a foggy night. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297915/free-photo-image-ghost-halloween-night-lampFree Image from public domain licenseCannon beach, United states.. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286105/free-photo-image-beach-waves-caveFree Image from public domain licenseNorthern light. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3282599/free-photo-image-aurora-northern-lights-cc0Free Image from public domain licenseJellyfish are probably some of the most unusual and mysterious creatures that you'll ever encounter. With their gelatinous… https://www.rawpixel.com/image/4021342/photo-image-ocean-art-blueFree Image from public domain licenseGolden light in tunnel. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286546/free-photo-image-spotlight-light-cc0Free Image from public domain licenseBoat in the middle of the sea. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286465/free-photo-image-sea-alone-boatFree Image from public domain licenseA country road disappears into a foggy horizon. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284840/free-photo-image-unknown-cc0Free Image from public domain licenseCape Town, South Africa. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3305596/free-photo-image-cc0-creative-commonsFree Image from public domain licenseThe northern light. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284137/free-photo-image-aurora-cc0-creative-commonsFree Image from public domain licenseAurora borealis on night sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3285675/free-photo-image-wilderness-astronomy-auroraFree Image from public domain licenseLost in the Wilderness. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3305285/free-photo-image-mist-cc0-creative-commonsFree Image from public domain licenseMysterious foggy woods. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370230/free-photo-image-fog-foggy-dark-forestFree Image from public domain licenseMysterious foggy woods. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3370091/free-photo-image-background-dark-forest-cc0Free Image from public domain licenseThe great mystery (Sphinkx) [sic]. From the album: Photograph album of Major J.M. Rose, 1st NZEF (1914-1915) by Major John… https://www.rawpixel.com/image/13028572/photo-image-landscape-black-and-white-mysteryFree Image from public domain licenseA mosaic of nine processed images acquired during Cassini's first very close flyby of Saturn's moon Titan on Oct. 26, 2004… https://www.rawpixel.com/image/8718397/photo-image-clouds-moon-vintageFree Image from public domain licenseJelly fish. There are many types of jellyfish in the ocean. These jelly-like creatures pulse along on ocean currents. Inside… https://www.rawpixel.com/image/4021356/photo-image-ocean-purple-natureFree Image from public domain licenseU.S. Soldiers walk toward the rising sun during the 10-kilometer road march at the 2013 Army Reserve Best Warrior… https://www.rawpixel.com/image/3315439/free-photo-image-soldier-trauma-2-mile-runFree Image from public domain licenseFree man in white mask and hoodie standing on escalator photo, public domain CC0 image. https://www.rawpixel.com/image/5903416/photo-image-public-domain-mask-personFree Image from public domain licenseFree Nuremberg architecture, Germany photo, public domain travel CC0 image. https://www.rawpixel.com/image/5905121/photo-image-public-domain-free-cityFree Image from public domain licenseCompound Microscope and Case by Michel Ferdinand d Albert d Ailly 6th duke of Chaulnes and Jacques Caffieri https://www.rawpixel.com/image/14264635/photo-image-wood-art-goldFree Image from public domain licenseStonehenge, prehistoric monument in England. Free public domain CC0 image. https://www.rawpixel.com/image/6031657/photo-image-public-domain-plant-natureFree Image from public domain licenseRelief attributed to Petamenophis, Late Period, Kushite-early Saite (ca. 710–640 B.C.) https://www.rawpixel.com/image/9331164/relief-attributed-petamenophisFree Image from public domain licenseStatuette of the God Horus as a Child (Harpokrates) by Ancient Egyptian https://www.rawpixel.com/image/9019367/statuette-the-god-horus-child-harpokrates-ancient-egyptianFree Image from public domain license