This cave is an ideal starting point for lovers of hiking, sometimes even cycling, or for trips with children. The entire foundation of this cave under the name Petrovská díra was formed by natural water erosion on the left slope of the ravine, which is called Petrovská jáma. Later, the cavity was artificially expanded and used for occasional living. Strž Petrovská jáma was created by subsequent erosion of a watercourse that flows into the main stream valley below the Strženka pond. This valley was formed earlier by subsidence along the fault line. The watercourse in the Petrovská jáma gradually deepened (up to 16 m) and revealed in disturbed and less resistant deposits the positions of stronger sandstones that emerge on the surrounding slopes. The action of water created niches, caves, vents and chimneys in them.
Holes and three artificially leveled platforms on the slopes of the ravine (probably platforms after huts) indicate that Petrovská díra was used for occasional residence. These were probably people bound by their activities to the forest, such as lumberjacks, beekeepers, and the like, or perhaps vagrants or robbers. Rumors speak of robbers, the name is documented as early as 1714. Sometimes the local robber tradition is also connected with the scattered remains of the band of the robber Jan Barůvek from Švamberk, who damaged many properties, especially those in Pilsen, at the beginning of the 16th century.
The Pilsen people captured him in his fortress in Křínov u Planá near Mariánské Lázně and in January 1507 they beheaded him in Pilsen. Shortly thereafter, large fires destroyed nearly three-quarters of the city. Although not proven, it was believed that the arsonist was hired by Bavůrk's friends who were avenging his execution.
TIPS ON: EXCURSIONS, ACCOMMODATION, SURROUNDING AREAS OF WATER
Accommodation in the vicinity - Pilsen
Accommodation in the area - Pilsen region
By the river - Berounka - 4,2 Km
At the pond - Bolevák - 2,4 Km
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