The Drachenfels ("Dragon's Rock", German pronunciation: [ˈdʁaxənˌfɛls]) is a hill (321 metres (1,053 ft)) in the Siebengebirge uplands between Königswinter and Bad Honnef in Germany.
The rock, like the rest of the Siebengebirge, is formed by the remnants of a volcano and has been the site of a trachyte quarry since Roman times, which, amongst others, delivered the building material for the Cologne Cathedral.
Of all the hills in the Siebengebirge, it is closest to the river Rhine, which facilitates easy transport by barges, thus making it an excellent place for a quarry.
The visit of Lord Byron to Mehlem [de] and its appearance in Childe Harold's Pilgrimage provided the rock with international attention.
The Drachenfels is sometimes irreverently called Schwiegermutterfelsen (mother-in-law rock) or jokingly referred to as "the highest hill in Holland" because of its popularity among Dutch tourists.
Whose breast of waters broadly swells Between the banks which bear the vine, And hills all rich with blossomed trees, And fields which promise corn and wine, And scattered cities crowning these, Whose far white walls along them shine, Have strewed a scene, which I should see With double joy wert thou with me!
[4] Several legends surround the Drachenfels, most famously that Siegfried – the hero of the Nibelungenlied – killed the dragon Fafnir, who lived in a cave in the hill, then bathed in its blood to become invulnerable.