Burg Rheinfels is a historic castle located in Sankt Goar, Germany, overlooking the Rhine River. Built in the 13th century, it served as a strategic fortress and residence for the Counts of Sponheim. The castle is known for its impressive ruins, which include towers, walls, and a large courtyard. Today, Burg Rheinfels is a popular tourist destination, offering visitors stunning views of the surrounding landscape and the river. The site features a museum that showcases the castle's history and artifacts, making it an important cultural landmark in the Rhineland-Palatinate region.