Excalibur Climbing Wall, Groningen, The Netherlands

The world's highest climbing wall is situated in the town of Groningen, The Netherlands. It is 37 metres (121 ft) high and is known as the Excalibur.
A climbing wall is an artificially constructed wall with grips for hands and feet, used for climbing. Some are brick or wooden constructions, but on most modern walls, the material most often used is a thick multiplex board with holes drilled into it. Recently, manufactured steel and aluminum have also been used. The wall may have places to attach belay ropes, but may also be used to practice lead climbing or bouldering.