Christiansø Lighthouse - Credit: Wikimedia Commons
Christiansø Lighthouse () is located on the top of the Store Tårn tower on the Danish island of Christiansø, some northeast of Bornholm in the Baltic Sea. Constructed and brought into service in 1805, it is one of Denmark's oldest."Christiansø Fyr", Den Store Danske. Retrieved 3 November 2012. Read more on Wikipedia
Source: en.wikipedia.org