Dramatic looking landscapes by American artist Louisa Davis Minot. Living from 1788 to 1858, she was part of the Hudson River School.

“White Mountains.” 19th c. American. Oil on canvas. Unsigned, titled and attributed on a handwritten gummed label affixed to the stretcher, with a temporary loan label from the Museum of Fine Arts, Boston, also on the stretcher. Attributed to Louisa Davis Minot. Image © 1999 – 2020 SKINNER, INC, Fair use license. via https://live.skinnerinc.com/lots/view/4-3KUQ3Y/attributed-to-louisa-davis-minot-american-1788-1858
Niagara Falls. 19th c. American. Oil on canvas. Louisa Davis Minot, painter. In the public domain due to age. via https://fineartamerica.com/featured/niagara-falls-louisa-davis-minot.html.
“Niagara Falls.” 1818. American. Oil on linen. Louisa Davis Minot, artist. Collections of the New York Historical Society. Image © The New-York Historical Society. Fair use license. via https://www.researchgate.net/figure/Niagara-Falls-1818-by-Louisa-Davis-Minot-Oil-on-linen-762-1032-cm-Gift-of-Mrs_fig4_307840044

Niagara Falls. 19th century. Multiple American artists.

Jasper_Francis_Cropsey_-_Niagara_Falls_from_the_Foot_of_Goat_Island_-_47.1238_-_Museum_of_Fine_Arts
“Niagara Falls from the Foot of Goat Island.” 1857. Oil on canvas. Jasper Francis Cropsey, artist (1823-1900). Collections of the Museum of Fine Arts, Boston. In the public domain in the United States because the artist has been dead over 100 years. via https://commons.wikimedia.org/wiki/File:Jasper_Francis_Cropsey_-_Niagara_Falls_from_the_Foot_of_Goat_Island_-_47.1238_-_Museum_of_Fine_Arts.jpg

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“Niagara Falls.” 1818. American. Louisa Davis Minot, artist (1788-1858). Collections of the New York Historical Society. Image © 2006-2017 Newington-Cropsey Cultural Studies Center. Fair use license. via http://www.nccsc.net/essays/hudson-river

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‘Niagara Falls from the American Side.” 1818. Oil on linen. Louisa Davis Minot, artist (1788-1858). Image © The New-York Historical Society. Fair use license. via http://museumartpaintings.com/Niagara-Falls-from-the-American-Side-by-Louisa-Davis-Minot-17012.html#.Xv39RChKjqU

Portraits of Niagara falls by Danish waterfall painter Joachim Ferdinand Richardt. Living from 1819 to 1895 he painted mostly houses in Denmark and, later, American waterfalls.

"Suspension Bridge over the Niagara River." ca. 1855-1856.
“Suspension Bridge over the Niagara River.” ca. 1855-1856. Image courtesy Hirschl & Adler, New York. Image © 2019 Incollect.com. Fair use license. via https://www.incollect.com/listings/fine-art/paintings/joachim-ferdinand-richardt-suspension-bridge-over-the-niagara-river-293701

"Niagara Falls." No date.
“Niagara Falls.” No date. Attributed to Richardt. Image © 2019 Sotheby’s. Fair use license. via http://www.sothebys.com/en/auctions/ecatalogue/2011/american-paintings-furniture-folk-art-and-silver-n08773/lot.305.html

"Underneath Niagara Falls." 1862.
“Underneath Niagara Falls.” 1862. Collection of the Metropolitan Museum of Art, New York. Cc0 license 1.0. via https://commons.wikimedia.org/wiki/File:Underneath_Niagara_Falls.jpg