Neuschwanstein Castle in the context of King's House on Schachen

The Lech (German pronunciation: [lɛç] ; Latin: Licus, Licca) is a river in Austria and Germany. It is a right tributary of the Danube 255 kilometres (158 mi) in length with a drainage basin of 3,919 square kilometres (1,513 sq mi). Its average discharge at the mouth is 115 m/s (4,100 cu ft/s).Its source is located in the Austrian state of Vorarlberg, where the river rises from lake Formarinsee in the Alps at an altitude of 1,870 metres (6,120 ft). It flows in a north-north-easterly direction and crosses the German border, forming the Lechfall, a 12-metre-high (39 ft) waterfall; afterwards the river enters a narrow gorge (the Lechschlucht). Leaving the Alps, it enters the plains of the Allgäu at Füssen at an elevation of 790 metres (2,580 ft) in the German state of Bavaria, where it used to be the location of the boundary with Swabia. The river runs through the city of Füssen and through the Forggensee, a man-made lake which is drained in winter. Here, it forms rapids and a waterfall.

The river flows further northwards through a region called the Lechrain, and passes the cities of Schongau, Landsberg, Augsburg (where it receives the Wertach) and Rain before entering the Danube just below Donauwörth at an elevation of 410 metres (1,330 ft). It is not navigable, owing to its torrential character and the gravel beds which choke its channel. There are extensive views of the Lech valley from Neuschwanstein Castle, near Füssen.

The Wartburg (German pronunciation: [ˈvaʁtbʊʁk]) is a castle originally built in the Middle Ages. It is situated on a precipice of 410 metres (1,350 ft) to the southwest of and overlooking the town of Eisenach, in the state of Thuringia, Germany. It was the home of St. Elisabeth of Hungary, the place where Martin Luther translated the New Testament of the Bible into German, the site of the Wartburg festival of 1817 and the supposed setting for the possibly legendary Sängerkrieg. It was an important inspiration for Ludwig II when he decided to build Neuschwanstein Castle.

Wartburg is the most visited tourist attraction in Thuringia after Weimar. Although the castle today still contains substantial original structures from the 12th through 15th centuries, much of the interior dates back only to the 19th century. In 1999, Wartburg Castle was inscribed on the UNESCO World Heritage List because of its quintessential medieval architecture and its historical and religious significance.

Ludwig II (Ludwig Otto Friedrich Wilhelm; German: [ˈluːtvɪç ˈɔto ˈfʁiː.dʁɪç ˈvɪlˌhɛlm]; 25 August 1845 – 13 June 1886), also called the Swan King or the Fairy Tale King (der Märchenkönig), was King of Bavaria from 1864 until his death in 1886. He also held the titles of Count Palatine of the Rhine, Duke of Bavaria, Duke of Franconia and Duke in Swabia. Outside Germany, he is at times called "the Mad King" or Mad King Ludwig.

Ludwig ascended to the throne in 1864 at the age of 18. He increasingly withdrew from day-to-day affairs of state in favour of extravagant artistic and architectural projects. He commissioned the construction of lavish palaces: Neuschwanstein Castle, Linderhof Palace, and Herrenchiemsee. He was also a devoted patron of the composer Richard Wagner. Ludwig spent all his own private royal revenues (although not state funds as is commonly thought) on these projects, borrowed extensively, and defied all attempts by his ministers to restrain him. This extravagance was used against him to declare him insane, a determination that is now questioned.

The Forggensee, also called the Roßhaupten Reservoir, is a reservoir located north of Füssen in the county of Ostallgäu in Bavaria, Germany and one of many lakes in the region around Hohenschwangau and Neuschwanstein castles. With a surface area of 15.2 km, it is the fifth-largest lake in Bavaria and the largest reservoir in Germany by area. The River Lech flows through it. The Forggensee is known primarily as a tourist destination for aquatic sports and recreation. Besides Füssen, other settlements on the lake include Halblech, Rieden am Forggensee and Roßhaupten. The lake takes its name from the former hamlet of Forggen which has been submerged by the reservoir.