18. Felsen genannt die Citadelle am oberen MIssouri.

Rocher dit la Citadelle sur lehaut Missouri.

The Citadel-Rock on the Upper Missouri.

Aquatint by Karl Bodmer, from "Maximilian, Prince of Wied’s Travels in the Interior of North America, during the years 1832–1834", an account of the expedition of the German explorer, ethnologist and naturalist, Prince Maximilian.

For those who need larger images, for publishing or or larger projects or anything else, I have them for sale on Alamy as much larger files. I earn money on Alamy sales through this link, and you can see the entire portfolio here: the Karl Bodmer Page at Alamy.