The architectural ensemble of the Blagaj Tekke (a Sufi lodge) stands by the source of the Buna river, not far from the centre of Blagaj. The musafirhana (guest house) and türbe (mausoleum) are tucked into the natural surroundings, constituting a single entity with the cliffs, source of the Buna river and mills. The musafirhana of the Blagaj tekke and the türbe have been preserved to this day. The musafirhana was built before 1664, and rebuilt in 1851 - its original appearance is not known. The building was subsequently repaired on several occasions. The ensemble of the Blagaj Tekke was presumably built very soon after Ottoman rule was established in Herzegovina, around 1520 at the latest.
The Château du Haut-Koenigsbourg is situated in a strategic area on a rocky spur overlooking the Upper Rhine Plain, it was used by successive powers from the Middle Ages until the Thirty Years' War when it was abandoned. From 1900 to 1908 it was rebuilt at the behest of the German kaiser Wilhelm II. Today it is a major tourist site, attracting more than 500,000 visitors a year.
The first records of a castle built by the Hohenstaufens date back to 1147. The fortress changed its name to Koenigsburg (royal castle) around 1157. The castle was handed over to the Tiersteins by the Habsburgs following its destruction in 1462. They rebuilt and enlarged it, installing a defensive system designed to withstand artillery fire.
The fortification work accomplished over the 15th century did not suffice to keep the Swedish artillery at bay during the Thirty Years War, and the defences were overrun.