Zündhütle, Industrial tower in Karlsruhe, Germany.

The Zündhütle is a 40-metre fall tower in Karlsruhe-Wolfartsweier, built in 1952/53 for the Gustav Genschow & Co. AG ammunition factory. Inside, liquid lead was poured through a sieve from the top and fell the height of the tower, hardening into small balls that were caught at the bottom. It is the only building of the factory still standing.

The Zündhütle was built in 1952/53 by the Gustav Genschow & Co. AG ammunition factory as a shot tower. In 1963 the factory became part of Dynamit Nobel AG, and ammunition production on the site ended in 1973. All other factory buildings were demolished, leaving only this tower, which is now a listed monument.

The name Zündhütle comes from the ammunition factory's vocabulary: a Zündhütchen is a primer cap. The tower is the only surviving building of the Gustav Genschow & Co. AG works, where cartridges and primers were made until 1973; everything else was demolished. Since then it has served the Karlsruhe Institute of Technology for meteorological and geodetic research.

The tower is accessible via hiking trails from the nearby village of Wolfartsweier, with a loop route of roughly 5 kilometers. The site is located in a rural area and works best for visitors on foot or arriving by car.

The tower's purpose was making lead shot, not ammunition balls: liquid lead ran through a sieve inside the tower and fell 40 metres, hardening into pellets that were caught at the bottom. The building is called Zündhütle, a term for a primer or detonator cap.