The Margorabbia is the river ( intermittent stream ) of Valtravaglia , a valley in the province of Varese , Lombardy , Italy . It is a tributary of the Tresa which it joins a few hundred metres upstream of Lake Maggiore .
5-542: The source is near Valganna . After forming a number of small lakes, including Lago di Ganna and Lago di Ghirla , its course continues through the Prealps of Varese until near Cunardo it is swallowed up by a system of caves: Pont Niv , Antro dei Morti , Grotte di Villa Radaelli and Grotte del Traforo . It emerges from underground near Ferrera di Varese and runs through the Valtravaglia [ it ] crossing
10-550: Is a compound of valley and Ganna, which is the name of one of the villages located in the valley. Lago di Ghirla and Lago di Ganna are located in the territory of the municipality. Valganna borders the following municipalities: Arcisate , Bedero Valcuvia , Brinzio , Cuasso al Monte , Cugliate-Fabiasco , Cunardo , Induno Olona ; the territory of the Comune is comprised in the Cinque Vette Park . This article on
15-544: The Margorabbia has a generally high discharge and dries up far less frequently than many torrents. These feature made it a useful source of power for the mills and factories which grew up along its banks. The power hammers of Ghirla in the commune of Valganna are particularly well known. The river is subject to sudden and dramatic increases in its flow, becoming truly ‘torrential’. Very often bridges have been destroyed, or it has broken its banks and caused severe flooding in
20-721: The Valtraviglia. Today many artificial embankments have been constructed along the Margorabbia for the purposes of flood protection. The river was mentioned by the writer Piero Chiara , who was born in Luino on Lake Maggiore, in his story Quando cominciò il mercato di Luino . Valganna Valganna is a comune (municipality) within the Province of Varese in the Italian region Lombardy , located about 60 km northwest of Milan and about 13 km north of Varese . The name Valganna
25-711: The valley’s communes of Grantola , Mesenzana and Germignaga . A cycle path has recently been constructed along this part of the river. The torrent has many affluents . The most important left side tributaries are the Rancina, the Boesio and the Gesone; from the right it receives the waters of the Boggione, the Lisascora and the Grantorella. Thanks to the wet and karstic areas it traverses,
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