Borgholm Castle is a historic fortress located on the island of Öland in Sweden. Originally built in the 13th century, it has undergone several renovations and expansions over the centuries. The castle played a significant role in regional defense and served as a royal residence during the 16th century. Today, Borgholm Castle is a popular tourist attraction, known for its impressive ruins and scenic views of the surrounding landscape. Visitors can explore the remnants of the castle, learn about its history, and enjoy various cultural events held on the grounds throughout the year.