Scene at the craggy mountains of Slavonia, historical region pertaining to modern-day Croatia. This is most probably a moment from the author's journey to Istanbul.
COECK VAN AELST, Pieter. The Turks in MDXXXIII. A series of drawings made in that year at Constantinople by Peter Coeck of Aelst, and published from woodblocks, by his widow, at Antwerp in MDLIII; reproduced, with other illustrations, in fac-simile, with an introduction by Sir William Stirling Maxwell, bart., London / Edinburgh, Privately printed for W.S.M., MDCCCLXXIII [=1873].
The Gennadius Library - The American School of Classical Studies at Athens