From the record
“The Bartlett Arboretum is a historic, nonprofit arboretum located in Belle Plaine, Kansas, United States. It is privately owned, and open to the public seasonally, as well as upon special request.”
Wikipedia article Bartlett Arboretum (Kansas), CC BY-SA 4.0.
One of 10 National Register listings published here for Sumner County · listed in 2010 · category: District · built in 1910.
Sources: the Wikipedia article · the National Register database, National Park Service