Duhlata is the longest cave system in Bulgaria. It is about 15 000 m long. It is formed in the Triassic limestone rocks and dolomites of the Mogilata Ridge on the southern slope of the Vitosha Mountains. One can see beautiful calcite formations, waterfalls and lakes with siphons in the cave. The cave is the habitat of 22 cave animals and many bats. It is proclaimed for a tourist site in 1962 covering an area of 50 hectares. It is located on the territory of the village of Bosnek, Municipality of Pernik.
The gorge of the Erma River or the Lomnishko Gorge is a picturesque canyon-shaped gorge at the mouth of the Lomnishka River by the village of Lomnitza, Municipality of Trun, Pernik District. The steep slopes of upper Jurassic rocks reach up to 120 m height along the river basin. The gorge of the Erma River is proclaimed for a natural landmark in 1961 with the purpose of preserving the unique rocky formations covering an area of 8,70 hectares.
If you want to buy a Paragliding flight over Pernik, click here.
Yankyovetz is a centuries-old oak forest and a natural habitat of the wild peony. It is located on the territory of the village of Izvor, Municipality of Radomir, Pernik District. It is proclaimed for a natural landmark in 1974. The protected area of the oak forest is 2,20 hectares and of the wild peony - 1,20 hectares.
The Choklyovo Swamp is a protected site since 1992. It covers an area of 320 hectares and is established as such with the purpose of preserving the natural habitats of rare and endangered birds and turf.