The main sights of Zavattarello is the castle, also known as Castello Del Verme, which overlooks the town. It was built in the 10th century and was owned by Dal Verme family from 1390 until 1975.
Outside it is majestic and surrounded by a wide park. The view from its terraces is breathtaking, from which you can see the Alpine Garden of Pietra Corva, that has very peculiar plants.
Now in the castle there is also a museum of modern art.
Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.