Lake Trasimeno is one of the most beautiful lakes on the Italian peninsula. It lies just over the border of Tuscany near
Cortona, and dominates the northwestern part of Umbria.
The lake is surrounded on three sides by the hills that are so common throughout the region, with a lowland stretching out from the west of the lake. Olive groves dot the hills surrounding the area, and hills nearest Tuscany also grow many grapes, along with other fruits and vegetables. The climate here is warmer that the other hills surrounding the lake, as they are at a lower elevation. Portions of the shores are covered in many older pines, willows and poplars; many of them over 30m tall.
The towns on the lake are all rather small in population. Some of the notable ones are Passignano sul Trasimeno, Tuoro, Monte del Lago, Torricella, San Feliciano, San Arcangelo, Castiglione del Lago, and Borghetto. Castiglione del Lago is probably the most well known as its the largest peninsula onto the lake and has the largest shoreline by far. The water of Trasimeno remains very clean, with very few large farms and a small population living on the lake it has been able to avoid some of the modern problems.