Masks from the Control Room (Masques du vestibule de contrôle) by Louis-Emile Durandelle https://www.rawpixel.com/image/8966428/photo-image-construction-hand-personFree Image from public domain license
The Half Dome, 4,953 feet, Yosemite, Cal. by Carleton Watkins https://www.rawpixel.com/image/14250406/the-half-dome-4953-feet-yosemite-cal-carleton-watkinsFree Image from public domain license
Merrimack St. from Washington Sq. [Haverhill, Mass.] by George C Robinson https://www.rawpixel.com/image/14296641/merrimack-st-from-washington-sq-haverhill-mass-george-robinsonFree Image from public domain license