Kurils/Iturup: Old Soviet Tanks
After the Soviet Union claimed the southern Kuril Islands in WWII victory over Japan and Japan later said it didn’t recognize the annexation – the risk of conflict here remained high for years. Soviet Union fortified the islands with artillery and tanks were dug in and hidden all around the islands that could get into action if needed. They stood there for years, slowly rusting in the rainy and cold climate. Today, the relationship between Russia and Japan has improved (although still no peace treaty) and the tanks just stand as monuments of the Soviet past. You can climb inside and some of the turrets and guns actually move and rotate.