General view of Niagara Falls and Goat Island by George Barker https://www.rawpixel.com/image/14320297/general-view-niagara-falls-and-goat-island-george-barkerFree Image from public domain licenseThe Johnstown Calamity. The Bursted Dam. by George Barker https://www.rawpixel.com/image/14286514/the-johnstown-calamity-the-bursted-dam-george-barkerFree Image from public domain license