A military bunker located near the Baltic Sea coast in northern Poland, close to the border with the Russian exclave of Kaliningrad. The specific designation '1-29 1934 (B1)' suggests a possible German military classification from the World War II era, consistent with the extensive Atlantic Wall fortifications built in this region. However, the provided web search results contain no direct information confirming the identity, function, or history of this particular structure.
Further localized historical or archaeological research would be required to verify its origins and purpose.