(Distance from Hahnenklee: 23 km, driving time: 33 min.)

To the north of Bad Grund, directly on the B 242 Harz high road, there rises to a height of 563 m Iberg Mountain (from the yews previously found here); a some 5 km long cave system, of which around 200 m – the Iberg Dripstone Cave – are easily accessible. The multicoloured shimmering stalactites and stalagmites are named after Harz legendary figures on account of their peculiar shapes. The cave is open all year round.