If you're looking for a reason to send something via U.S. mail, look no further: A new book of stamps from the U.S. Postal Service features paintings from the Hudson River School art movement, including Thomas Moran's Grand Canyon. The "forever" stamps, available in books of 20, are the 12th installment in the USPS' American Treasures series. The other three stamp designs are Thomas Cole's Distant View of Niagara Falls, Asher B. Durand's Summer Afternoon and Frederic Edwin Church's Sunset. Of Moran's painting, the USPS had this to say in a news release:

Thomas Moran is represented by the 1912 painting Grand Canyon, from the collection of the Nelson-Atkins Museum of Art in Kansas City, Mo. The painting embodies Moran’s ability to convey scenes that are both idealized, but also recognizable to people who have seen the actual landscape themselves. “My aim,” Moran said in 1878, “was to bring before the public the character of the region.”

You can buy the stamps at any post office or on the USPS website.