Ralsko (mountain)

Ralsko (German: Rollberg or Roll) is a mountain in the Liberec Region of the Czech Republic. It is a 698-metre-high (2,290 ft) basalt isolated cone mountain. It is the highest peak of the Ralsko Uplands and of the entire Bohemian Table subprovince. The ruins of the Gothic Ralsko Castle are on its top. The summit area is protected as a nature reserve.