Cannon Fort

This guide to Cannon Fort above Ha Long Bay follows a single French cannon, forged in 1910 and hauled up more than 170 meters to watch for ships approaching Hai Phong harbor. You'll hear how the position changed hands, from the French to a Japanese occupation that carved tunnels into the rock below, sheltering as many as 500 people, and then to Vietnamese fighters who turned the same guns against their former colonizers and, later, American aircraft. Step into the tunnels behind the gun emplacement.