Javorník, Mountain summit in the Bohemian Forest, Czech Republic

Javorník is a 1067-metre summit, the highest point of the Javornická hornatina in the Prachatice district, rising above the village of the same name. On its slopes are the remains of adits from quartz mining for glassworks, and the stone Klostermann lookout tower stands by the top.

Karel Klostermann, a writer of the Bohemian Forest, favoured this spot and campaigned with friends for a lookout tower; the First World War halted the plans, which resumed only between the wars. The stone Klostermann Tower was completed and opened on 28 August 1938. During the Second World War Javorník was the highest mountain of Bohemia within the Protectorate, and the tower served as an anti-aircraft observation post.

The stone lookout tower on the summit bears the name of the Šumava writer Karel Klostermann, who favoured this place and, with friends, pushed for a tower to be built. It was completed and opened on 28 August 1938.

The summit lies above the village of Javorník in the Prachatice district, at the northwestern edge of the Javornická hornatina. The stone Klostermann lookout tower stands by the top; its viewing platform is 30 m above ground, reached after the tower was raised to 39 m in 2002–2003. The tower also serves mobile operators.

Below the summit are remnants of adits from quartz mining that supplied glassworks. During World War II, Javorník was the highest mountain in Bohemia within the Protectorate, and the lookout tower served as an anti-aircraft observation post.