The Curved Bridge of the St. Anthony River Aqueduct (Aqueducto do Rio Sto. Antonio - Ponte Curva). by Marc Ferrez https://www.rawpixel.com/image/14248555/photo-image-person-sky-waterFree Image from public domain licenseThe Witches' Sabbath (recto); Sketches of Centaurs (verso) by Auguste Rodin https://www.rawpixel.com/image/8971971/the-witches-sabbath-recto-sketches-centaurs-verso-auguste-rodinFree Image from public domain license91st P.V. Vol. Tablet, on Little Round Top - looking across Valley of Death to Wheat-field, Peach Orchard & (---illeg.) by… https://www.rawpixel.com/image/14299029/photo-image-cross-public-domain-tabletFree Image from public domain license91st Pa. Vol. Monument and general view from Little Round Top. by William H Tipton https://www.rawpixel.com/image/14298789/photo-image-public-domain-rubbleFree Image from public domain license