The Vladivostok Fortress is one of the most extensive military fortification systems in the Russian Far East — a network of underground galleries, gun batteries, artillery positions, and command posts that ring the city and spread across Russky Island. The system was built over three decades starting in 1889, at enormous expense, but obsolescence arrived before completion.
The Fortress Museum near the central city preserves a section of the underground tunnels and a collection of heavy artillery. The more adventurous sites are on Russky Island — accessible by the bridge — where several large batteries with original cannon can be explored, many of them still in excellent condition. Local guides run tours that cover the tunnel networks; visiting without a guide is possible but disorienting. The combination of dramatic coastal scenery and Cold War-era military hardware makes the fortress one of the more distinctive attractions in the Russian Far East.