This site has been known since the 15th century and has rich lead and iron mining traditions. To see the most interesting geological curiosity of Łagów we head northwards from the market square taking the road for Nowa Słupia and after 500 metres, we turn right into Dule street, which leads us to a rocky canyon by the same name. There is a hypothesis that Dule canyon was formed as a result of the collapse of a large karst cave that water had eroded in ca. 390 million years old middle-Devonian limestone. A testimony to the krast phenomena that are taking place here is the Zbójecka cave, also known as Łagowska which is located on the eastern side, about 20 metres above the bottom of the canyon. The cave has one entrance that has a visible rock hood. The total length of the tunnel that water has eroded is ca. 200 metres. Another curiosity is the lesser horseshoe bat that inhabits this cave. This cave is the site where this species was first spotted in the Świętokrzyskie voivodship.

Another geological site near Łagów is the very interesting exposure in Płucki – some 1.5 km north of Łagów – where traces of early-Devonian Placodermi (from ca. 400 Ma) can be observed.