Kluže Fortress stands at the top of a narrow canyon between the slopes of Rombon and Izgora, by the Koritnica River 4 km north of Bovec.
It was erected as a control post at the crossing of the river. The time of origin of the older fortress at this site is not known, but a wooden building stood there already in the second half of the 15th century to defend the Friuli Plain and the Venetian Republic against the Turks.
In 1797 the French army burnt down and destroyed the medieval fortress.
In World War I it was used for placing new recruits immediately behind the front line.
Now inside there is a smaller tourist office, a presentation of the history of the fortress and its surroundings, a local painting gallery and a wedding hall.