The tar stove is located on the edge of the Kamenný rybník reserve near Pilsen. It is one of the few remaining stone furnaces for tar extraction by means of dry wood distillation. It is a technical monument that can be reached by following the Sigmond trail.
The furnace was built at the end of the 18th century. Similar constructions were known in this area already in the Middle Ages. It operated until the second half of the 19th century, when the wood tar, also called tar, was replaced by cheaper and more available oil. The furnace was renovated in the mid-twentieth century and declared a monument.
It is a round building, bell-shaped. In the lower part there are three hearths. The furnace has double walls. Inside, wood was placed under which a fire was set. The holes were then sealed and the wood distilled. The ointment obtained in this way was used for impregnation, lubrication of car axles and other protective works.