Spicher Hohlstein

Spicher Hohlstein is a large quartzite rock formation standing at Hohlsteinstrasse in Troisdorf with a distinctive hollow cavity on top. The natural monument displays visible damage patterns across its surface from past disturbances.

The stone formed through natural geological processes and was altered over time by human activity. French occupation forces conducted blasting experiments on it in 1810, which created the hollow shape seen today.

Multiple legends tell of giants using the stone as a hat and a white lady walking around it, whose hair turns into gold.

The site is easy to reach and features an information board with geological and historical details. Visitors should wear sturdy footwear and watch for uneven ground when approaching the stone formation.

In the 1970s, scientists developed a theory about the stone's possible function that went far beyond its geological origins. This hypothesis still captures visitors' imagination today and adds an intriguing layer to the site.

Location: Troisdorf

Made from material: quartzite

GPS coordinates: 50.82500,7.13625

Latest update: December 14, 2025 17:42