The German army moved in immediately after 1 October 1938 and occupied the Sudetenland. The emplacement at Dobroaov is situated on an imposing outcrop above the district town of N chod near the village of Dobroaov at a height of 625 m. above sea level. The various parts were connected by 1750 metres of underground corridors, where the plans called for underground munitions depots and 750 metres of living quarters. Underground, all the corridors and chambers called for in the plan were tunneled out, but only about half were lined with concrete. T he tour of the fortification lasts 75 minutes.
Visitors can see all the completed buildings as well as the underground corridors and chambers.
The fortification was opened to the public in 1969 and since then it has attracted more than one and a half million visitors. Many of the visitors also walk along the nature trail surrounding the fortification. The path passes through picturesque countryside and leads to the isolated infantry blockhouse of Brezinka. It formed part of the line of heavy fortifications and during the Protectorate it suffered heavy damage, like most of the other fortifications in the N chod area. Nowadays, however, both the structure itself as well as the technical equipment are in the same state as in 1938.