The Ombrone (Latin: Umbro ) is a 160-kilometre (99 mi) long river in Tuscany , central Italy .
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1-633: The Ombrone's source is at San Gusmè , near Castelnuovo Berardenga , on the south-eastern side of the Monti del Chianti . After a twisting route, it receives the waters of the tributaries Arbia , Merse and Orcia before reaching the plain near Istia d'Ombrone . It subsequently passes near the city of Grosseto , before flowing into the Tyrrhenian Sea . 42°39′31″N 11°00′47″E / 42.65861°N 11.01306°E / 42.65861; 11.01306 This Province of Grosseto location article
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