The Rocca di Angera, an example of a perfectly preserved medieval fortified construction, dominates the southern shore of Lake Maggiore. Thanks to its strategic position on a rocky promontory, it has been the best vantage point for monitoring commercial and military movements since the Middle Ages.

Today, it belongs to the Borromeo family. Vitaliano I Borromeo acquired it in 1449, along with all its appurtenances, including the parish, paying the Visconti, originally from Verbano, the sum of 12,800 lire.

Built in the 11th century, the Rocca consists of five different buildings constructed at different times. These include the Castellan Tower, with a square plan, providing a 360-degree view of Lake Maggiore and the surrounding peaks from the top. The Scaligera Wing, dating back to the 13th century, underwent a conservative restoration between 2015 and 2017 and derives its name from the heraldic motifs frescoed on its expansive walls. The Borromeo Wing, credited to the Borromeo family, saw major restoration works after the 15th century, followed by decorative interventions by leading Milanese painters.

The Visconti Wing, leaning against the Castellan Tower, now houses the Doll and Toy Museum, founded in 1988 by Princess Bona Borromeo Arese. It is the largest of its kind in Europe.

The final structure that makes up the Rocca is the Tower of Giovanni Visconti, located in the area adjacent to the southern end of the Visconti Wing.

Approaching the Rocca, one is amazed by the imposing dimensions of the castle. However, upon crossing the Medieval Garden, reminiscent of the original green space, the solemnity of the various halls is striking, where important 14th-century frescoes, canvases, and furnishings evoke the atmosphere of another era.