thumb|Fermona waterfall, by Margorabbia torrent, in Ferrera di Varese 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.
thumb|Fermona waterfall, by Margorabbia torrent, in Ferrera di Varese 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.
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.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).