Hammershus Castle Ruins, located on Bornholm island, is Northern Europe's largest medieval fortress, offering stunning views of the Baltic Sea. The site is generally accessible, though some areas may present challenges for those with mobility issues due to uneven terrain. Exploring independently allows for flexibility, while guided tours provide historical context. The ruins are open year-round, but weather conditions can affect the experience, especially during winter. Entrance to the site is free, but there may be costs associated with parking or guided tours. A typical visit lasts between 2 to 3 hours, allowing ample time to explore the ruins and enjoy the scenic surroundings.