The Castle rises on a steep outcrop of rock partly overlooking Arsoli while the other side looks over the park with its beautiful formal gardens. A tree-lined avenue leads from the gateway in the village of Arsoli through the gardens to the large square the castle is located on.

A significant portion of the “piano nobile” has been made available for events: the main salon with its beautiful and artistically important seventeenth century frescoes by Marco Benefial, depicting the nuptuals of Perseus and Andromeda and views of the fiefdoms of the Princes Massimo; two smaller rooms, and the Hercules room, whose walls bear witness to the endeavours of the mythical hero. The frescoes on the vaults are attributed to the Zuccari brothers.

The four rooms are accessed through the two armeries which flank the hanging garden and are adorned with great portraits of the princes and their consorts. The hanging garden is small but luxuriant with a fountain surrounded by lemon trees, wisteria, iris and flowers of all kinds and which looks over the park below from on high. The park is dominated by a statue of the goddess Roma, which goes back to Roman times. The small church dedicated to Saint Filippo Neri also gives on to the hanging garden.