R-S 90/II is a military bunker located in Czechia, near the town of Hradec Králové. This structure is part of the country's Cold War-era fortifications, built during the period of Soviet influence in Central Europe. The bunker likely served as part of the strategic defense network established to protect against potential NATO incursions during the Cold War standoff.
Its location in the Czech Republic reflects the broader pattern of military infrastructure development across the Warsaw Pact nations during this tense geopolitical period.