Dengzhou Water City (Penglai Ancient Naval Fortress)

Dengzhou Water City, adjoining the Penglai Pavilion Scenic Area on the Penglai District coast, was built in 1376 during the early Ming dynasty as a fortified naval harbor to defend the Shandong peninsula against Japanese pirate (wokou) raids, making it one of the oldest surviving purpose-built naval anchorages in China. The fortress combines a semicircular stone seawall enclosing an inner tidal harbor with a sluice gate system that regulated water levels so warships could be sheltered and repaired without exposure to open-sea swells, a piece of hydraulic engineering that remains largely intact. Surviving structures include sections of the Ming-era fortress wall, a watchtower used for coastal surveillance, and the stone sluice gate itself, alongside reconstructed barracks and a small shipyard area illustrating how Ming and later Qing dynasty vessels, including ships connected to the 19th-century Beiyang Fleet's northern coastal defenses, were built and maintained. The site's presentation follows the visitor along the harbor's edge from the outer seawall to the inner basin, pairing preserved fortifications with reconstructed elements and information panels covering the fortress's Ming-era construction, its role in anti-piracy coastal defense, and its later use during the Qing dynasty's efforts to modernize northern coastal defenses. Restoration carried out as part of the broader Penglai Pavilion Scenic Area development has rebuilt sections of wall and gatehouse using traditional stone and timber methods, so much of what visitors see today is careful reconstruction on the original Ming footprint rather than untouched original fabric.