Armádní muzeum U Trigonometru

The infantry fortification OP-S 25 'U Trigonometru' in Milostovice is one of the best-equipped bunkers in the Czech Republic. The museum features fully equipped and armed interiors approaching 1938 ideal conditions, and is notable as the first in Czechoslovak fortress museum history to display two L1 fortress cannons in shooting rooms. It has been a cultural monument since 2009.