Hospital de la Santa Cruz, Barcelona: a staircase leading up to the women's department; to the right is the metal barred… https://www.rawpixel.com/image/14017891/photo-image-person-pharmacy-hospitalsFree Image from public domain licenseTunnel tunnel architecture outdoors. AI generated Image by rawpixel. https://www.rawpixel.com/image/13109256/tunnel-tunnel-architecture-outdoors-generated-image-rawpixelView licenseArchitecture outdoors building indoors. AI generated Image by rawpixel. https://www.rawpixel.com/image/12498301/architecture-outdoors-building-indoors-generated-image-rawpixelView licenseNankow pass, Pechili province, China. Photograph, 1981, from a negative by John Thomson, 1871. https://www.rawpixel.com/image/13998280/photo-image-plant-tree-waterFree Image from public domain licenseGezicht op de Bosbrug naar het Nieuwe Voorhout, Den Haag. Tegendruk. (c. 1685 - c. 1698) by anonymous and Jan van Call I https://www.rawpixel.com/image/13780049/image-paper-person-artFree Image from public domain licenseCorpses standing against the walls of catacombs at Guanajuato, Mexico. Process print after C.C. Pierce & Co. https://www.rawpixel.com/image/13988431/image-person-clothing-roadFree Image from public domain licenseUnknown location. Photograph, 1981, from a negative by John Thomson, 1866. https://www.rawpixel.com/image/13993378/unknown-location-photograph-1981-from-negative-john-thomson-1866Free Image from public domain licenseArchitecture building indoors light. AI generated Image by rawpixel. https://www.rawpixel.com/image/12498299/architecture-building-indoors-light-generated-image-rawpixelView licenseDe Achterburgwal te Amsterdam (1870 - 1926) by Willem Wenckebach https://www.rawpixel.com/image/13788102/achterburgwal-amsterdam-1870-1926-willem-wenckebachFree Image from public domain licenseSt John's Gate, Clerkenwell, London: the north side. Watercolour by R. Rushen. https://www.rawpixel.com/image/13967265/johns-gate-clerkenwell-london-the-north-side-watercolour-rushenFree Image from public domain licenseNankow pass, Pechili province, China. Photograph, 1981, from a negative by John Thomson, 1871. https://www.rawpixel.com/image/14017414/photo-image-person-public-domain-wallFree Image from public domain licenseRuïne van het middenschip van Holyrood Chapel in Edinburgh (c. 1870 - c. 1890) by James Valentine https://www.rawpixel.com/image/13757273/photo-image-church-road-public-domainFree Image from public domain licenseArchitecture futuristic building corridor. https://www.rawpixel.com/image/14028657/architecture-futuristic-building-corridorView licenseHospital de la Santa Cruz, Barcelona: a staircase leading up to the men's department; at the foot there is a statue of… https://www.rawpixel.com/image/13976141/photo-image-plant-person-treeFree Image from public domain licenseHospital de la Santa MarÃa, Lérida: exterior. Photograph, ca.1900. https://www.rawpixel.com/image/13985921/hospital-santa-maria-lerida-exterior-photograph-ca1900Free Image from public domain licenseScene photo town gate architecture building https://www.rawpixel.com/image/12643325/scene-photo-town-gate-architecture-building-generated-image-rawpixelView licenseStructure of covered bridge. Wallingford, Vermont. Sourced from the Library of Congress. https://www.rawpixel.com/image/12269379/photo-image-wood-public-domain-archFree Image from public domain licenseSakura tunnel in japan rain outdoors walking. https://www.rawpixel.com/image/14507236/sakura-tunnel-japan-rain-outdoors-walkingView licenseAesthetic Photography of walking architecture silhouette tunnel. https://www.rawpixel.com/image/13683590/aesthetic-photography-walking-architecture-silhouette-tunnelView licenseParis architecture building corridor. https://www.rawpixel.com/image/13310369/paris-architecture-building-corridorView licenseUpon TyneOur overnight location is in the centre of Newcastle. We've been for a walk round and it's a really lovely town to… https://www.rawpixel.com/image/5975599/photo-image-public-domain-person-cityFree Image from public domain licenseA black and white aerial shot of the bridge connecting San Francisco to Oakland. Original public domain image from Wikimedia… https://www.rawpixel.com/image/3299509/free-photo-image-arch-bridge-archedFree Image from public domain licenseSydney by night.The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular… https://www.rawpixel.com/image/4022317/photo-image-water-city-buildingFree Image from public domain licenseThe alwasy moving city. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3299487/free-photo-image-arch-bridge-archedFree Image from public domain licenseSydney Harbour Bridge, Sydney, Australia. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3296251/free-photo-image-arch-bridge-archedFree Image from public domain licenseTrain on bridge near Vy?ehrad in Prague. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3371575/free-photo-image-arch-bridge-archedFree Image from public domain licenseParis invalides bridge architecture building outdoors. https://www.rawpixel.com/image/13304926/paris-invalides-bridge-architecture-building-outdoorsView licenseThe Bridge of Remembrance which links Oxford and Cambridge Terraces over the Avon River at Cashel Street was opened on… https://www.rawpixel.com/image/4022734/photo-image-person-city-buildingFree Image from public domain licenseArch architecture outdoors woodland. https://www.rawpixel.com/image/14136593/arch-architecture-outdoors-woodlandView license One of several tunnels through the Tennessee portion of Great Smoky Mountains National Park, the… https://www.rawpixel.com/image/8071482/photo-image-plant-tree-forestFree Image from public domain licenseCameron's Cone from "Tunnel 4," Colorado Midland Railway by William Henry Jackson https://www.rawpixel.com/image/14250854/photo-image-frame-plant-personFree Image from public domain licenseArchitecture building corridor sunlight. AI generated Image by rawpixel. https://www.rawpixel.com/image/13202840/architecture-building-corridor-sunlight-generated-image-rawpixelView licenseThe Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular, bicycle, and… https://www.rawpixel.com/image/4023399/photo-image-water-city-buildingFree Image from public domain licenseAn urban bridge before dusk with headlight and tail light trails from passing traffic. Original public domain image from… https://www.rawpixel.com/image/3283392/free-photo-image-bridge-tower-archFree Image from public domain licenseArchitecture futuristic cityscape building. https://www.rawpixel.com/image/14028678/architecture-futuristic-cityscape-buildingView licenseHighway landscape outdoors vehicle. https://www.rawpixel.com/image/13626140/highway-landscape-outdoors-vehicleView licenseEmpty highways road stage overpass street tunnel. https://www.rawpixel.com/image/14131811/empty-highways-road-stage-overpass-street-tunnelView licenseTunnelgatan met de ingang van de Brunkebergstunnel in Stockholm (1894 - 1910) by anonymous and Neue Photographische… https://www.rawpixel.com/image/13734986/photo-image-person-road-public-domainFree Image from public domain licenseSuspension Bridge, Carriage Way, Niagara by Edward and Henry T Anthony and Co https://www.rawpixel.com/image/14284232/suspension-bridge-carriage-way-niagara-edward-and-henry-anthony-andFree Image from public domain licenseKuilenburgse spoorbrug over de Lek (1868 - 1885) by Pieter Oosterhuis https://www.rawpixel.com/image/13756536/kuilenburgse-spoorbrug-over-lek-1868-1885-pieter-oosterhuisFree Image from public domain licenseHoly Family Street, Looking Through Hope Gate. by L P Vallée https://www.rawpixel.com/image/14299595/holy-family-street-looking-through-hope-gate-valleeFree Image from public domain licenseA mine: cross-sections of a pulley and tunnels in the mine. Etching by W. Lowry. https://www.rawpixel.com/image/14002673/image-cross-pattern-public-domainFree Image from public domain licenseMan op de voltooide brug over de Waal bij Culemborg (1868) by Pieter Oosterhuis and Blom en Olivierse https://www.rawpixel.com/image/13757004/photo-image-person-water-clothingFree Image from public domain licenseThe new Fitzherbert Bridge (15) (12 June 1936) by Leslie Adkin. https://www.rawpixel.com/image/13027892/the-new-fitzherbert-bridge-15-12-june-1936-leslie-adkinFree Image from public domain licenseBlue flower tunnel outdoors nature architecture. https://www.rawpixel.com/image/13805709/blue-flower-tunnel-outdoors-nature-architectureView licenseDUMBO Manhattan architecture metropolis cityscape. AI generated Image by rawpixel. https://www.rawpixel.com/image/12979038/photo-image-background-cloud-skyView licenseThe entrance to Little Ormond Yard, off Great Ormond Street. Watercolour by J. P. Emslie, 1882. https://www.rawpixel.com/image/13960643/image-person-art-watercolourFree Image from public domain licenseThe Boulac Bridge, Cairo. From the album: Photograph album of Major J.M. Rose, 1st NZEF (1914-1915) by Major John Rose. https://www.rawpixel.com/image/13029698/image-rose-person-skyFree Image from public domain licenseModern canal architecture landscape outdoors. https://www.rawpixel.com/image/14357760/modern-canal-architecture-landscape-outdoorsView licenseInterieur van de Mazzinigalerij in Genua (c. 1870 - c. 1890) by Alfredo Noack https://www.rawpixel.com/image/13757236/interieur-van-mazzinigalerij-genua-c-1870-1890-alfredo-noackFree Image from public domain license