The famous castle built by King Ludwig II of Bavaria is Neuschwanstein Castle. Constructed in the late 19th century, it is located in the Bavarian Alps near Füssen, Germany. Designed in a romantic, fairy-tale style, Neuschwanstein features turrets, towers, and elaborate interiors inspired by Germanic mythology and medieval architecture. Ludwig II commissioned the castle as a tribute to Richard Wagner and as a personal retreat. Though construction was never fully completed, it became a popular tourist destination and is one of the most iconic castles in the world, often referred to as the inspiration for Disney's Sleeping Beauty Castle.