Military remains
Coastal Defense Battery 10b
By Djubbviken bay at the northern tip of Naissaar stand the ruins of Coastal Battery No. 10b, built in 1913–1917 for Peter the Great's Naval Fortress, which together with No. 10a held the southern end of the line meant to bar the Gulf of Finland. It had two armoured turrets each carrying a pair of 12-inch guns, 90 metres either side of a three-storey, 15-metre command tower with armour up to 25 cm thick, all linked by an underground tunnel. A searchlight position and bunker were built nearby to direct fire at night. The northern turret was blown up in 1918.
Open it on the map See the spot on the old maps and as it is today
Eesti keeles
Naissaare põhjatipus Djubbvikini lahe ääres on rannakaitsepatarei nr 10b varemed. Patarei ehitati aastatel 1913–1917 Peeter Suure merekindluse jaoks ja hoidis koos patareiga nr 10a Soome lahe riivistusliini lõunaosa. Sellel oli kaks soomustorni, kumbki kahe 12-tollise kahuriga, 90 meetri kaugusel kolmekorruselisest 15 meetri kõrgusest komandotornist, mille soomus oli kuni 25 cm paks, ning kõike ühendas maa-alune tunnel. Lähedale ehitati helgiheitja positsioon ja punker, et öösel tuld juhtida. Põhjapoolne torn õhiti 1918. aastal.
Source: https://et.wikipedia.org/wiki/Rannakaitsepatarei_nr_10b ↗