Tomburg

Tomburg - Credit: Wikimedia Commons

The Tomburg is a castle ruin near Wormersdorf, a village in the municipality of Rheinbach near the German city of Bonn. It is located in a small nature reserve that contains a number of rare plant species, on the high Tomberg hill. The Tomberg is a relic of the Tertiary. Liquid lava rose up in a volcano; erosion has since removed the outer layers and left a basalt dome. Read more on Wikipedia

type: military installation
date from: {{circa|900}}

Source: en.wikipedia.org