Paintings of the great outdoors by American artist George Benjamin Luks (1867-1933). Ashcan school.

"Holiday on the Hudson." ca. 1912.
“Holiday on the Hudson.” ca. 1912. Oil on canvas. Collection of the Cleveland Museum of Art. via,_c._1912.JPG
"The Swan Boats." ca. 1922.
“The Swan Boats.” ca. 1922. Oil on canvas. Sothebys. via
"Verdun, France." ca. 1915.
“Verdun, France.” ca. 1915. Watercolor on paper. The Phillips Collection. via,_France_-_Google_Art_Project.jpg.

These images are all in the public domain, “The Swan Boats” being in the public domain in the United States because its creator died before 1948.

Richard Edward (Emil) Miller (1875– 1943). American Impressionist.

"The Parasol." 1913.
“The Parasol.” 1913. Collection of the Minneapolis Institute of Art. In the public domain in the United States because the artist has been dead longer than 70 years. via and
"Scarlet Necklace". No date.
“Scarlet Necklace”. via In the public domain.
"Arranging Flowers"". 1910.
“Arranging Flowers”. 1910. Private collection. via In the public domain.
"La Toilette". ca. 1910.
“La Toilette”. ca. 1910. Collection of the Columbus Museum, Columbus, Georgia. via In the public domain.