K-S 5 U potoka casemate

K-S 5 "U potoka" is a preserved infantry bunker in the municipality of Malá Morava, standing in the southern part of the Dolní Morava settlement in the Králíky border region near the Polish border. It now houses a museum dedicated to the Czechoslovak border fortifications built between 1935 and 1938, and it's often described as the best-restored fortification of its kind in the area.

What exactly is K-S 5?

The bunker was built in 1936 as part of the heavy fortification line Czechoslovakia raised along its border in response to the growing threat from Nazi Germany. Concrete work on the structure ran from November 30 to December 6, 1936, and the object reached full combat readiness in September 1938, right before the Munich Agreement. Its armament included two anti-tank guns and thirteen machine guns, manned by a garrison of roughly forty soldiers. In the end, no fighting took place here — after Munich, the border region was handed over without armed resistance.

How did it become a museum?

Since 1993–1994, the bunker has been cared for by the KVH Kralka military history club, whose volunteers rebuilt and restored it to its 1938 condition. That long-term restoration work turned K-S 5 into one of the few places where visitors can see a Czechoslovak border fortification close to its original state, complete with equipment, weaponry, and functioning technical installations.

What will you see on a visit?

Tours run about 40 minutes and take visitors through the bunker's interior with a guide. Inside, you'll find an original anti-tank cannon (type L1), a fully operational "Kunz Buldog" pump — the only working example of its kind in the country — and a completely functional water installation. Outside, the reconstructed armored cupolas are on display, a signature feature of Czechoslovak fortifications from this period. The exhibition illustrates both the technical sophistication of pre-war Czechoslovak arms industry and the scale of effort put into defending the country's borders.

How do you get there?

K-S 5 sits in Dolní Morava, a well-known tourist destination at the foot of Králický Sněžník, easily reached by road from both the Czech and Polish sides. It makes a natural stop for anyone exploring the Králíky border region, and it pairs well with a hike on nearby trails or a visit to other military fortifications along the former border line, which runs through the whole area.

When is the best time to visit?

The museum operates seasonally, mainly during summer months and long weekends, when guides are available for regular tours. It's worth planning ahead, since group sizes are limited and the bunker's interior is fairly tight.

Frequently asked questions

What is a "pěchotní srub"? It's a type of heavy infantry combat bunker, part of the Czechoslovak border fortification system built in the 1930s as a defense against potential German aggression.

How long does a tour of K-S 5 take? A guided tour typically lasts about 40 minutes and covers the bunker's interior and its combat equipment.

Who runs the museum? Since the 1990s, the site has been managed by the KVH Kralka military history club, which restored the bunker through volunteer work.

Did any fighting happen at K-S 5? No — the bunker reached full combat readiness in September 1938, but the area was surrendered without armed conflict following the Munich Agreement.