The abandoned building in the later scenes is the Colonia Varese hotel complex in Milano Marittima, Italy. Opened as a fascist-era holiday complex in 1938, it closed two years later after the outbreak of World War II. After being used as a prison and hospital for Germany troops, it lie abandoned since the 1950s, and at the time of writing (2019) is still standing.
Italian censorship visa # 78586 delivered on 19 February 1983.