The Late Gothic Eagle Tower was built in the 15th century as a part of the Rüdesheim city fortification. It is 20,5 m high with a 5 m interior diameter, 1 m thick walls, four floors and an underground dungeon accessible only through a hole in the vaulted ceiling. It was located close to the river. In winter, when the frozen up Rhine was safe for crossing on foot, a basket with combustible material was put on the tower as a fire signal. In the 19th century, when the Adlerturm housed an inn called “Zum Adler” (In the Eagle), Johann Wolfgang von Goethe, Germany’s greatest poet and literary man, frequently stayed here during his Rüdesheim visits in order to enjoy the magnificent view of the Rhine. Today the Adlerturm is the property of a bank.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.