Lönsturm, Observation tower in Salzhemmendorf, Germany

Lönsturm is an observation tower that stands on Kanstein, the highest point of Thüster Berg. The sandstone structure offers views from its platform across the surrounding hills and, on clear days, toward Brocken mountain in the Harz region and the Hermannsdenkmal monument.

The sandstone tower was built in 1928 to a design originally planned 10 m taller, which lack of funds prevented. Its architect's 18 m structure was raised by 5 m in 1972 for Salzhemmendorf's 950th anniversary, and again in 1997, because young beeches around it were blocking the view. The outer masonry and some steps were repaired in mid-2014.

The tower bears the name of Hermann Löns, a regional writer who frequently visited the Kanstein area during his outdoor excursions.

Access to the tower platform is free and reached by climbing stairs that vary in difficulty depending on the season and weather conditions. Visitors should keep in mind that climbing can be difficult during rain or strong winds, and sturdy footwear is recommended.

The architect planned the original 1928 sandstone tower 10 metres taller, but a lack of funds kept it at 18 metres. It was raised by 5 metres in 1972 for Salzhemmendorf's 950th anniversary and again in 1997. The outer masonry and some steps were repaired in mid-2014.