The Humberg Tower is a monumental construction of sandstone blocks, typical of the Wilhelminian period. Building began in the spring of 1899. The building material was quarried on the spot from the stone plateau of the Humberg. The tower was ceremonially opened on 2 September 1900. The tower is 35.77 metres (119 feet) high and its observation platform is 28.16 metres (93 feet) above the ground. The spiral staircase inside has 130 steps; in addition, there are a further 33 steps in the outside stairs at the base.