Goethestein, Tetrahedron monument in Frauenstein district, Wiesbaden, Germany.

The Goethestein is a stone tetrahedral monument standing on the southeast slope of Spitzen Stein at approximately 230 meters elevation in the Frauenstein district. The structure offers views across the Rhine valley, the Rheingau vineyards, and the surrounding landscape.

The monument was built in 1932 to mark where Johann Wolfgang von Goethe conducted geological studies during an 1815 visit to the region. The location near Hof Nürnberg was chosen to commemorate this scientific inquiry.

The tetrahedral shape reflects Goethe's belief that science and art together expand human knowledge and achievement. Visitors immediately recognize this geometric symbolism when approaching the monument.

The monument is accessible via several hiking routes, including the Rheinsteig trail connecting from both Frauenstein and Wiesbaden. The ascent is moderate, and visitors should wear proper hiking shoes and allow about an hour for the walk.

The tetrahedron rests on a base of equilateral triangular stone blocks, and its tall tip is likened to an obelisk. Until February 2025 the Frauenstein observation tower stood a few metres above the Goethestein; it has since been removed.