Friern Hospital, London: a boy with rotten teeth. Photograph, 1890/1910. https://www.rawpixel.com/image/13954519/friern-hospital-london-boy-with-rotten-teeth-photograph-18901910Free Image from public domain licenseMan silhouette, red background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298581/free-photo-image-horror-halloween-albaniaFree Image from public domain licenseFlock of birds, dark sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298876/free-photo-image-horror-animal-birdFree Image from public domain licenseA rendition of the scary clown Pennywise from the movie "It". Original image from Carol M. Highsmith’s America… https://www.rawpixel.com/image/3092138/free-photo-image-clown-movie-horrorFree Image from public domain licenseBlack and white long shot of The Wanaka Tree in New Zealand with cloudy sky. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3302807/free-photo-image-black-and-white-nature-horrorFree Image from public domain licenseA rundown hospital room with hospital beds and a cabinet in the United Kingdom.. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3289152/free-photo-image-architecture-abandoned-house-interiorFree 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 licenseHistoric Blakeley State Park in Alabama. Original image from Carol M. Highsmith’s America, Library of Congress… https://www.rawpixel.com/image/433804/free-photo-image-death-cemetery-horrorFree Image from public domain licenseQuestion mark spray painted on trees. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295756/free-photo-image-question-alphabet-barkFree Image from public domain licenseA moody road in a foggy, damp forest. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3284127/free-photo-image-road-horror-morningFree Image from public domain licenseAbandoned home in rural Maryland. Original image from Carol M. Highsmith’s America, Library of Congress collection.… https://www.rawpixel.com/image/421889/free-photo-image-horror-scary-haunted-houseFree Image from public domain licenseFear and Horror by Guillaume Benjamin Duchenne and Adrien Alban Tournachon https://www.rawpixel.com/image/14263009/fear-and-horror-guillaume-benjamin-duchenne-and-adrien-alban-tournachonFree Image from public domain licenseA skull prepared for demonstration: front view. Photograph. https://www.rawpixel.com/image/13970604/skull-prepared-for-demonstration-front-view-photographFree Image from public domain licenseSkull (20th century). Original public domain image from The Smithsonian Institution. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/10103530/photo-image-face-vintage-skullFree Image from public domain licenseAn Alaskan Inuit skull, showing the effects of syphilis. Photograph by Ales Hrdlicka, ca. 1910. https://www.rawpixel.com/image/13951380/photo-image-face-person-black-backgroundFree Image from public domain licenseA skull prepared for demonstration: side view. Photograph. https://www.rawpixel.com/image/13960185/skull-prepared-for-demonstration-side-view-photographFree 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 licenseRaindrop on the glass window. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297427/free-photo-image-creepy-night-rain-textureFree Image from public domain licenseA skull from Peru, with extensive caries or flaking decoration. Photograph. https://www.rawpixel.com/image/13961034/skull-from-peru-with-extensive-caries-flaking-decoration-photographFree Image from public domain licenseSkulls: eleven skulls arranged on three shelves. Photograph. https://www.rawpixel.com/image/13963517/skulls-eleven-skulls-arranged-three-shelves-photographFree Image from public domain licenseSkulls: twenty-one skulls or parts of skulls arranged in four rows. Photograph. https://www.rawpixel.com/image/13962177/skulls-twenty-one-skulls-parts-skulls-arranged-four-rows-photographFree 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 licenseAbandoned home in rural Maryland. Original image from Carol M. Highsmith’s America, Library of Congress collection.… https://www.rawpixel.com/image/421882/free-photo-image-house-scary-farmFree Image from public domain licenseBack of a woman looking through small window. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3292402/free-photo-image-airplane-window-moon-travel-pictures-imagesFree Image from public domain licenseFriern Hospital, London: a young child with rotten teeth. Photograph, 1890/1910. https://www.rawpixel.com/image/13956104/photo-image-face-hand-personFree Image from public domain licenseUnderground tunnel, background photo. Free public domain CC0 image. https://www.rawpixel.com/image/6016125/photo-image-background-wallpaper-public-domainFree Image from public domain licenseOcean, starry night sky, beach. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3297894/free-photo-image-horror-astronomy-australiaFree Image from public domain licenseElaine "and the dead" Oar'd by the dumb went upwards with the flood. by Julia Margaret Cameron https://www.rawpixel.com/image/14254020/photo-image-face-person-artFree Image from public domain licenseFervojstacio en nokta nebulo.. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304679/free-photo-image-railway-asphalt-buildingFree Image from public domain licenseSeagulls fly over the ocean shore on a foggy day. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3295852/free-photo-image-horror-mist-animalFree Image from public domain licensePortrait of a Female Patient, Surrey County Asylum by Hugh Welch Diamond https://www.rawpixel.com/image/14250116/portrait-female-patient-surrey-county-asylum-hugh-welch-diamondFree Image from public domain licensePeking, Pechili province, China: a nightwatchman. Photograph, 1981, from a negative by John Thomson, 1869. https://www.rawpixel.com/image/13955758/photo-image-face-person-swordFree Image from public domain licenseGreenwood Cemetery in Tuscaloosa, Alabama. Original image from Carol M. Highsmith’s America, Library of Congress… https://www.rawpixel.com/image/433812/free-photo-image-cemetery-grave-deathFree Image from public domain licenseThe skeleton of a friar in the role of Death as the reaper, surrounded by skulls, ribs and vertebrae, in a chapel.… https://www.rawpixel.com/image/14008892/photo-image-face-person-crossFree Image from public domain licenseCalm isolated lake near pine on a misty morning in Pic de Néouvielle. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3291668/free-photo-image-animal-bird-cc0Free Image from public domain license