Rocca del Leone is a medieval castle located in the town of Castiglione del Lago, in the Umbria region of Italy. The castle was built in the 13th century, and was once an important defensive fortress protecting the town from invaders. The castle is situated on top of a hill, overlooking the stunning Trasimeno Lake and the surrounding countryside.

The castle has undergone several renovations and restorations over the centuries, with the most recent work taking place in the early 20th century. Today, it serves as a museum and cultural center, hosting art exhibitions, concerts, and other cultural events.

Visitors to Rocca del Leone can explore the castle's ramparts and towers, and enjoy panoramic views of the surrounding landscape. The castle also houses a museum dedicated to the history of Castiglione del Lago and the surrounding region. The museum's exhibits include medieval artifacts, paintings, and sculptures, as well as a collection of traditional Umbrian costumes and textiles.

In addition to its historical and cultural significance, Rocca del Leone is also a popular destination for outdoor enthusiasts. The castle is surrounded by hiking and biking trails that offer scenic views of the lake and surrounding hills, and the lake itself offers opportunities for swimming, boating, and fishing.