Today there’s a single-family farm and not much else, but at one time Olmaņi was the site of two important coastal batteries collectively known as “Krastnoflotskaya.” Until 1955, the one to the South of Olmaņi, there were four 152-mm Kane type cannons, which were manufactured during World War I and were widely used to protect the coastal territory of the Baltic Soviet republics of Latvia and Estonia during the rule of the Soviet regime. Small concentric ramparts of earth are all that’s left there today. After 1955, to the North of Olmaņi, another battery was installed with four MY-2 152-mm cannons. They had a range of 25 km. The battery remained in battle readiness until 1975, when it was turned into a reserve facility. It’s not easy to find, but it’s worth the search. The platforms for the cannons and the subterranean bunkers are still there. This was indeed one of the most impressive coastal batteries along the shores of the Baltic Sea.

The so-called Comet Fort was built on the Left Bank of the Daugava at its mouth, not far from the present Daugavgrīva lighthouse. It was built around the same time as the other forts of Mangaļsala (around 1808, although some sources say 1788). There were four Kane-type 152-mm cannons. The defensive batteries at Komētforts and Mangaļsala repelled a British naval attack in the Daugava estuary in 1855. It has to be added that Komētforts is a cultural monument of local importance. If we go along the shore of the sea from the Daugavgrīva nature reserve toward the Daugavgrīva lighthouse and scale the frontal dunes (without going past the sign which says “Closed Territory. Border Zone.”), then we can see the positions of the cannons, as well as underground cellars where munitions were once stored. The territory starts approximately 500 metres before the Daugavgrīva lighthouse and stretches to the lighthouse itself. During Soviet times, the territory was closed to civilians, because many secret military objects were in this area and in Bolderāja.