"Gorin's Dome", No. 18 from the series "Mammoth Cave Views" by Chas. Waldack https://www.rawpixel.com/image/8966847/gorins-dome-no-from-the-series-mammoth-cave-views-chas-waldackFree Image from public domain license"Wandering Willie's Spring", No. 12 from the series "Mammoth Cave Views" by Chas. Waldack https://www.rawpixel.com/image/8966784/photo-image-hand-church-artFree Image from public domain license"Wild Hall", No. 23 from the series "Mammoth Cave Views" by Chas. Waldack https://www.rawpixel.com/image/8966476/wild-hall-no-from-the-series-mammoth-cave-views-chas-waldackFree Image from public domain license"Bottomless Pit" and "Bridge of Sighs", No. 19 from the series "Mammoth Cave Views" by Chas. Waldack https://www.rawpixel.com/image/8966090/photo-image-wooden-art-paintingFree Image from public domain license"Bandit Hall", No. 30 from the series "Mammoth Cave Views" by Chas. Waldack https://www.rawpixel.com/image/9013733/bandit-hall-no-from-the-series-mammoth-cave-views-chas-waldackFree Image from public domain licenseSaint Francis and Brother Leo Meditating on Death by El Greco (Domenikos Theotokopoulos) https://www.rawpixel.com/image/9265528/image-face-hands-picassoFree Image from public domain licenseRustam Slays the White Div (recto), Text (verso), Folio from a Shahnama (Book of Kings) https://www.rawpixel.com/image/11932912/image-face-heart-handsFree Image from public domain licenseNiagara Falls, New York. Original image from Carol M. Highsmith’s America, Library of Congress collection. Digitally… https://www.rawpixel.com/image/421751/free-photo-image-nature-background-niagara-falls-carol-highsmith-waterfallFree Image from public domain licenseUnderground background, Glitch game illustration. Free public domain CC0 image. https://www.rawpixel.com/image/7419770/image-background-public-domain-illustrationsFree Image from public domain licenseEntrance to the Cave at Enoshima Island in Sagami Province, Number 15 by Utagawa Hiroshige https://www.rawpixel.com/image/11931985/image-art-sky-vintageFree Image from public domain licenseSumner, with Cave Rock and Matuku-takotako beach from Sumner Head (24 March 1959-13 April1959) by Leslie Adkin. https://www.rawpixel.com/image/13028318/photo-image-beach-wave-mountain-filmFree Image from public domain licenseFotoreproductie van een schilderij van de Blauwe Grot op het eiland Capri, Italië (1857 - 1914) by Giorgio Sommer and… https://www.rawpixel.com/image/13733462/image-paper-frame-personFree Image from public domain licenseCave of the Golden Calf: Study of Two Frenzied Dancers by Spencer Frederick Gore https://www.rawpixel.com/image/9205907/image-watercolors-vintage-goldenFree Image from public domain licenseRama and Lakshmana Search in Vain for Sita: Illustrated folio from a dispersed Ramayana series, India, Rajasthan, Mewar https://www.rawpixel.com/image/9184145/image-rama-sita-indian-paintings-ramayanaFree Image from public domain license"The Seven Sleepers of Ephesus", Folio from a Falnama (Book of Omens). Original public domain image from The MET Museum https://www.rawpixel.com/image/7727183/public-domain-image-from-the-metFree Image from public domain licenseRuïne van een gotische kerk (after 1800 - before 1899) by anonymous https://www.rawpixel.com/image/13733012/ruine-van-een-gotische-kerk-after-1800-before-1899-anonymousFree Image from public domain licenseCave of the Golden Calf: Study for Deer Hunting Mural by Spencer Frederick Gore https://www.rawpixel.com/image/9205901/image-watercolors-vintage-goldenFree Image from public domain licenseGezicht op een gewelf over een rivier (1700 - 1799) by anonymous and Marie Jeanne Ozanne https://www.rawpixel.com/image/13736007/image-paper-horse-cowFree Image from public domain licenseThe Grotto of Posillipo at Naples (1826) by Antonie Sminck Pitloo https://www.rawpixel.com/image/13733192/the-grotto-posillipo-naples-1826-antonie-sminck-pitlooFree Image from public domain licenseCubiculum (bedroom) from the Villa of P. Fannius Synistor at Boscoreale, Roman https://www.rawpixel.com/image/9183071/photo-image-art-vintage-paintingsFree Image from public domain licenseMonkeys and Bears Investigate the Rikshabila Cave, Folio from the "Shangri" Ramayana (Adventures of Rama) https://www.rawpixel.com/image/11932156/image-face-person-artFree Image from public domain licenseEen monnik met een glas in de hand in een kelder (1800 - 1900) by F Taupel https://www.rawpixel.com/image/13735351/een-monnik-met-een-glas-hand-een-kelder-1800-1900-taupelFree Image from public domain licenseTwee tekenaars bij het Nymphaeum van Egeria in het Caffarella Park bij Rome (1796) by Francis Jukes, Robert Freebairn… https://www.rawpixel.com/image/13734855/image-paper-person-treeFree Image from public domain licenseGezicht op de pas van Tête Noire, mogelijk nabij Trient in Zwitserland (1813 - c. 1870) by anonymous, Thomas Miles… https://www.rawpixel.com/image/13735408/image-dog-paper-horseFree Image from public domain licenseGezicht op de ruïnes van de Villa Maecenas te Tivoli (1796) by Francis Jukes, Robert Freebairn, Francis Jukes, Robert… https://www.rawpixel.com/image/13735219/image-paper-person-artFree Image from public domain licenseGezicht op de Gorges du Trient bij Vernayaz in Zwitserland met een man op een brug (c. 1880 - c. 1920) by Francis Frith https://www.rawpixel.com/image/13733481/photo-image-person-art-waterFree Image from public domain license"Formations - detail, formations 'in the Queen's Chambers,' at the entrance. Carlsbad Caverns National Park," New Mexico.… https://www.rawpixel.com/image/8799721/photo-image-art-vintage-public-domainFree Image from public domain licenseThe Poems of Thomas Gray, Design 17, "Ode on a Distant Prospect of Eton College." by William Blake. Original from Yale… https://www.rawpixel.com/image/9204127/image-hoop-vintage-birds-nest-bat-wingFree Image from public domain licenseGezicht de zuidkust van Java (1854) by Carl Wilhelm Mieling, Frans Wilhelm Junghuhn, Koninklijke Nederlandse Steendrukkerij… https://www.rawpixel.com/image/13740676/image-paper-frame-plantFree Image from public domain licenseSagami Province: Entrance to the Caves at Enoshima (Sagami, Enoshima iwaya no kuchi), from the series "Famous Places in the… https://www.rawpixel.com/image/8951429/image-sky-art-oceanFree Image from public domain licenseTheodosius Arrives at Ephesus, from a Scene from the Legend of the Seven Sleepers of Ephesus, French https://www.rawpixel.com/image/9185413/photo-image-art-vintage-public-domainFree Image from public domain license"The Giant Dome, largest stalagmite thus far discovered. It is 16 feet in diameter and estimated to be 60 million years old.… https://www.rawpixel.com/image/8799733/photo-image-art-vintage-public-domainFree Image from public domain licenseThe First Book of Urizen, Plate 23 (Bentley 9) by William Blake. https://www.rawpixel.com/image/9199016/the-first-book-urizen-plate-bentley-william-blakeFree Image from public domain licenseThe First Book of Urizen, Plate 9, "Chap: IV | 1 Ages on ages roll'd over him . . . ." (Bentley 10) https://www.rawpixel.com/image/9204042/image-vintage-book-public-domainFree Image from public domain licenseGezicht op een rots onderweg bij bezichtiging van eiland Ghozo (1778) by Louis Ducros https://www.rawpixel.com/image/13738673/image-paper-frame-personFree Image from public domain licenseVictorian politicians sympathetic to Irish Home Rule in the guise of Guy Fawkes and his conspirators breaking into the… https://www.rawpixel.com/image/13970719/image-cartoon-person-bookFree Image from public domain licenseSide Table by Johann Paul Schor called Giovanni Paolo Tedesco https://www.rawpixel.com/image/14264514/side-table-johann-paul-schor-called-giovanni-paolo-tedescoFree Image from public domain licenseTivoli: ruins of the villa of Maecenas. Coloured engraving, ca. 1804-1811. https://www.rawpixel.com/image/13969024/tivoli-ruins-the-villa-maecenas-coloured-engraving-ca-1804-1811Free Image from public domain licenseTwo Assemblies, from Cave 224, Smithsonian American Art Museum, Gift of John Gellatly https://www.rawpixel.com/image/8847420/two-assemblies-from-cave-224Free Image from public domain licenseA lion standing outside a cave with four other lions in the background. Etching by J.E. Ridinger. https://www.rawpixel.com/image/13962146/image-background-dog-lionFree Image from public domain licenseThe Virgin of the Rocks (ca. 1601–1700) painting in high resolution by Leonardo da Vinci. Original from The National… https://www.rawpixel.com/image/3043683/free-illustration-image-vinci-leonardo-renaissanceFree Image from public domain licenseTwo Gentlemen Going a Shooting, with a View of Creswell Crags, Taken on the Spot (1767) painting in high resolution by… https://www.rawpixel.com/image/3819810/illustration-image-art-peopleFree Image from public domain license