Horticultural Hall received special recognition when the United States Department of the Interior placed it on the National Register of Historic Places.

This fine Arts & Crafts structure, still largely intact, was designed by the well-known architectural firm of Spencer & Powers. Built originally for the Lake Geneva Horticultural Society, it has been used and supported primarily by the Lake Geneva Gardner's & Foreman's Association, founded in 1905, and the Lake Geneva Garden Club, founded in 1915.