Syvähuoko House, built in Functionalist style near Mököistenmäki Hill and along the River Vähäjoki, is one of the most unique architectural attractions in Salo. Completed in 1934, the earliest Functionalist building in Salo was built for Jalmari and Selma Syvähuoko, and designed by the architect Eero Seppälä. In terms of its architecture, the building is a pure representative of Functionalism. It is also considered unique in many respects in terms its of construction technology. At the end of the 1960s, Syvähuoko House was at risk of being demolished until the building was protected in 1974 under the Building Protection Act as a nationally significant cultural historical heritage site.