The enchanting island of Capr has many alluring sights, including the romantic ruins of a castle. The Barbarossa Castle looms over the cliffs of Capri on Mt. Solaro, near Anacapri. The construction date is uncertain, but it is thought to have been constructed in the 9th century, and may have been the largest fortress of its era. It was built using materials excavated from Roman ruins.

The castle was updated by the Normans and a cylindrical watch tower and additional protection walls were added in the 13th century. Despite being a formidable presence, it was sacked and destroyed in 1544 by the famed pirate Barbarossa (Red Beard), thus giving it the name that has stayed with it through the centuries. It was never rebuilt, and today the remains of this ancient fortress that still stand sentinel have an air of antiquity and mystery about them.

The property was purchased by Swedish physician Axel Munthe who had a villa nearby and was an active environmentalist. He turned it over to his foundation for the protection of birds and native species. A formal observation station was established in 1956 to study migratory birds and the WWF now recognizes and protects the site. Amidst the wild natural landscape you'll find numerous trails to take in the breathtaking views, hear the songs of the birds, and spend some time in nature. There are butterfly gardens and fern gardens, and you'll likely catch sight of the island's unusual blue lizard.

There is a museum dedicated to Axel Munthe and interpretive displays for the nature park.