Climatron is the name of an indoor garden in Missouri, at the Missouri Botanical Gardens in St. Louis. Hey, my niece lives in St. Louis, maybe I should visit!
Looks climate controlled, somewhat tropical. I wonder if they have butterflies?
Anyway, they do have a Cactus Show and Sale at the Botanical Gardens in July. Check it out!
And most remarkably they have historic photos of the Cactus House right there at the Missouri Botanical Gardens.
Cactus House – North side looking east (1890s greenhouse).
Cactus House (1904-1914) (Missouri Botanical Garden)
Contributor Missouri Botanical Garden
Date of original 1890