Peca

Petzen (German) or Peca (Slovene) is the highest mountain of the eastern Karawanks, the second-highest mountain of the Northern Karawanks and the most eastern two-thousand-metre mountain of Slovenia. It is a mighty mountain with a characteristic shape of a tableland with rocky peaks protruding from it. The mountain borders the Meža Valley and the Topla Valley to the south and east, and the Jaun Valley to the north, and is separated by the narrow valley of the Bela Creek from Hochobir. Two thirds of the mountain lies in Austria, and one third in Slovenia. The mountain reaches its highest elevation on the mountain crest of the Kordež Head (Slovene: , German: , ). The border runs across it.

The mountain is built of Triassic Wetterstein limestone and Wetterstein dolomite. In the past, lead and zinc was mined on Peca, the shafts belonging to the Topla and Mežica mines. The lead-zinc ore occurs in Middle to Upper Triassic carbonate rocks deposited in an anoxic supratidal marine environment, similar to other Mississippi Valley-type lead-zinc ores. In addition to the ore, several rare minerals were discovered underground in the mountain, such as wulfenite and calcite. A mine on the mountain is accessible to mountain bikes.