Panorama of Niagara Falls - Early photography, Public domain image

Niagara Falls is a group of three waterfalls at the southern end of Niagara Gorge, spanning the border between the US state of New York and the Canadian province of Ontario. The largest of the three is Horseshoe Falls, also known as Canadian Falls, which straddles the international border between Canada and the United States. The smaller American Falls and Bridal Veil Falls lie entirely within the United States. Bridal Veil Falls are separated from Horseshoe Falls by Goat Island and from American Falls by Luna Island, with both islands situated in New York as well. Located on the Niagara River, which drains Lake Erie into Lake Ontario, the combined falls have the highest flow rate of any waterfall in North America that has a vertical drop of more than 50 meters (160 ft). Niagara Falls is famed both for its beauty and as a valuable source of hydroelectric power. In 1881, the Niagara River's first hydroelectric generating station was built. The water fell 86 feet (26 m) and generated direct current electricity, which ran the machinery of local mills and lit up some of the village streets. In 1893, Westinghouse Electric designed a system to generate alternating current. In 1896, giant underground conduits leading to turbines generating upwards of 100,000 horsepower (75 MW), we installed.

Langenheim Brothers was a photography studio founded in Philadelphia in 1846 by William and Frederick Langenheim. They were known for their innovative techniques and pioneering work in the field of photography. The Langenheim Brothers were among the first photographers to use the daguerreotype process and also experimented with stereoscopic photography, which produced 3D images. The Langenheim brothers' work was highly regarded and they received numerous awards for their photography, including a gold medal at the Great Exhibition in London in 1851. They also photographed notable figures of their time, such as Edgar Allan Poe and Abraham Lincoln. The Langenheim Brothers' studio continued to operate into the early 1900s, and their legacy lives on through their contributions to the development of photography as an art form.