Friolzheimer Riese, German for Giant of Friolzheim is the designation of a 47 metres tall lattice tower on Geissberg northeast of
Friolzheim

Friolzheim

Friolzheim is a town in the district of Enz in Baden-Württemberg in Germany. The 47 metre tall telecommunications tower, Friolzheimer Riese is located here....

, Baden-Württemberg, Germany. It was used until 2003 for radio relay links of US military (during its final use as a U.S. facility, part of the Defense Information Systems Network

Defense Information Systems Network

The Defense Information System Network has been the United States Department of Defense's enterprise network for providing data, video and voice services for 40 years....

) in Germany. The tower is now used for non-military communication purposes.
A special feature of it are the four large concrete basements on which its 4 legs stand on.