Kiek in de Kök is an artillery tower built between 1475 and 1483. It is 38 m high and has walls 4 m thick. Cannon balls dating back to 1577 are still embedded in its outer walls. Compared to the other Tallinn towers Kiek in de Kök was predominant in its fire power, due to its 27 embrasures for cannons and 30 for handguns
Kiek in de Kök (low German Peep into the Kitchen ) is an old German language nickname for towers, mainly those which were parts of town fortifications. They gained the name from the ability of the tower occupants to literally see what's cooking in the kitchens of nearby houses.
Due to the history of the Hanseatic League and the Teutonic Order, also towers far outside modern Germany bear this name, like in Gdańsk and Tallinn.
20th century restoration work saw the tower and surrounding area returned to a more historical look. The tower now serves as a museum and photographic gallery.
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.