The IV. Friedrichshammer is located in the Selke valley between Mägdesprung and the scout center.

Under Prince Friedrich von Anhalt-Harzgerode, an ironworks was built in 1646 and four hammer mills were established along the Selke: Friedrichshammer I to IV. The settlements founded at these four locations of the former hammer mills are still preserved today and are known as Hammer 1 to 4.
In 2010, the Klock family built a forest inn in an old barn at IV. Hammer, which was built in 1857 from local slate. The family-run establishment offers a café with a café garden, a restaurant with vegetarian and vegan dishes, a bakery, vacation apartments and rooms.
In Mägdesprung, the „Carlswerk“ dominates the street entrance to the Selke valley as a single building. The three-storey factory building of the former Mägdesprung ironworks is a testimony to industrial culture and representative industrial architecture. The factory building was erected in 1865 for the manufacture of special metalworking and woodworking machinery with a focus on „sawmill construction“ alongside the older industrial section of the Carlswerk, which had existed since 1827.
From there, follow the well-signposted Selketalstieg trail through the romantic Selketal valley, past the „Herzog-Alexis-Erbstollen“ to the IV Hammer.
