Basaltpark, Geological museum in Bad Marienberg, Germany.

Basaltpark is an outdoor museum in Bad Marienberg featuring numerous basalt columns and rock formations from a former quarry. The site has a learning trail around a lake that formed in the lowest section of the old mining site.

Basalt was quarried here for centuries, and the stone working shaped the economy of Bad Marienberg and its surroundings. Quarrying has ended and the former open-cast pit has been recultivated as a park; it now belongs to the Landschaftsmuseum Westerwald as an outdoor branch and is a Geopunkt of the Geopark Westerwald-Lahn-Taunus.

The open-air museum shows old lorries and small locomotives once used in Westerwald basalt quarries, and panels explain the work of the tippers who loaded the stone. The Basaltpark is an external branch of the Landschaftsmuseum Westerwald and a geopoint of the Geopark Westerwald-Lahn-Taunus.

The park is free to access year-round with no entrance fees. Visitors should wear sturdy shoes since the learning trail goes over rocky terrain and uneven ground around the lake.

The five- or six-sided basalt columns here vary in thickness and height and often stand in "Meilerstellung", leaning together like the conical piles of a charcoal kiln. The former quarry is a Geopunkt of the Geopark Westerwald-Lahn-Taunus, and the Wildpark Bad Marienberg lies directly above it.