Wanne observation tower is one of the oldest lattice towers in the world. It was built in 1888 by the observation tower cooperative on the 778-meter (2,552 ft) high Wanne mountain tub east of Villingen, in the Schwarzwald-Baar district in southern Baden-Württemberg, Germany. It was erected by bell foundry Grueninger of Villingen. The 30-meter (98 ft) high tower has three platforms and is remarkable for its uncommon design, as it has an octagonal cross section.
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