The Rosandra Valley is a valley centered on the Rosandra River in the municipality of Dolina in the Italian region of Friuli Venezia Giulia, between the city of Trieste and the border with Slovenia. It is also included into a natural park, mostly set around the Rosandra River and the surrounding hills reach an elevation of 412 metres (1,352 ft). The northern end of the valley crosses the Italian-Slovenian border. The Rosandra Valley is part of the Karst geographical region. Tourist attractions in the valley are 40-metre (130 ft) Supet Falls near the village of Botazzo and Our Lady of Siaris Church perched high in the hills of the valley.