The Möhnesee Dam is a significant dam located in the North Rhine-Westphalia region of Germany. Completed in 1921, it was built to control the flow of the Möhne River and provide water for drinking and irrigation. The dam is also known for its role in hydroelectric power generation. The dam creates the Möhnesee, a large reservoir that covers approximately 10 square kilometers. It is a popular destination for outdoor activities such as hiking, cycling, and water sports. The dam's impressive structure and scenic surroundings attract many visitors each year.