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Images:
https://commons.wikimedia.org/wiki/File:Details_Roman_Road_Santa_Agueda.jpg
https://commons.wikimedia.org/wiki/File:Aqueduct_Segovia_2_2012.jpg
https://commons.wikimedia.org/wiki/File:Pont_Julien,_a_3_BC_Roman_arch_bridge_over_the_Calavon_river,_built_on_the_Via_Domitia,_France_(14715845784).jpg
https://commons.wikimedia.org/wiki/File:Inka_suspension_bridge_Qeswachaka_DSC_2730.jpg
https://commons.wikimedia.org/wiki/File:Rio_apurimac.jpg
https://commons.wikimedia.org/wiki/File:Segmental-arch-center.png
https://www.loc.gov/resource/hhh.mt0084.photos/?sp=14
https://commons.wikimedia.org/wiki/File:Spannband-Holzbruecke,_Essing_01_10.jpg
https://commons.wikimedia.org/wiki/File:Al_Khazneh_Petra_edit_2.jpg
https://commons.wikimedia.org/wiki/File:Arabia_Petraea.svg
https://commons.wikimedia.org/wiki/File:P%C3%A9tra._Vestiges_d%27une_tuyauterie_en_terre_cuite.jpg
https://commons.wikimedia.org/wiki/File:P%C3%A9tra._R%C3%A9servoir_creus%C3%A9_dans_le_roc.jpg
https://commons.wikimedia.org/wiki/File:Petra_Jordan_BW_40.JPG
https://commons.wikimedia.org/wiki/File:Budj_Bim_%E2%80%90_Mt_Eccles_National_Park,_Victoria,_Australia_39.jpg
https://www.inaturalist.org/observations/100539546
https://commons.wikimedia.org/wiki/File:Budj_Bim_%E2%80%90_Mt_Eccles_National_Park,_Victoria,_Australia_18.jpg
https://www.inaturalist.org/observations/18413120
https://www.inaturalist.org/observations/3977618
https://commons.wikimedia.org/wiki/File:Qanat_Kashan.jpg
https://commons.wikimedia.org/wiki/File:Qanat_cross_section.svg
https://commons.wikimedia.org/wiki/File:Insideqanat.JPG
https://commons.wikimedia.org/wiki/File:QanatFiraun.JPG
https://commons.wikimedia.org/wiki/File:Windcatcher_at_Ganjali_Khan_Complex,_Kerman.jpg
https://commons.wikimedia.org/wiki/File:Qanat_wind_tower.svg
https://commons.wikimedia.org/wiki/File:Yakhch%C4%81l_of_Geli2021_9.jpg
https://en.wikipedia.org/wiki/File:Malqaf.svg
https://commons.wikimedia.org/wiki/File:Andes1a.JPG