
The "Yellow Flower" wall where the Great Wall disappears into a reservoir. Restored and unrestored sections with unique water-wall scenery — watchtowers rising straight from the lake.

Huanghuacheng (黄花城, Huánghuāchéng — "Yellow Flower City") is the only Great Wall section partially submerged in a reservoir. Three sections of wall enter the water and re-emerge on the opposite shore, creating a scene you will not find anywhere else on the 21,000 km wall system. Located about 80 km north of Beijing in Huairou District, the section gets its name from the yellow wildflowers that bloom on the hillsides in late spring. The western stretch is restored and walkable; the eastern stretch is wild. In summer you can kayak or stand-up paddleboard on the reservoir and paddle under the wall — I did this in August 2024 and the scale of the submerged towers from water level is surreal.
Yes — three sections of Ming Dynasty wall are submerged in the reservoir, built when the dam was completed in 1974. On clear days you can see watchtower foundations beneath the surface. The water level varies by season; spring (before rainy season) offers the best visibility.
The restored western section is fine for children 8+ — the steps are moderate and the wall is wide. The boat ride on the reservoir is a hit with younger kids. Avoid the wild eastern section with children. The whole area is more relaxed than Badaling or Mutianyu.
Bus 916 Express from Dongzhimen to Huairou (1.5 hours, ¥6), then minibus H21 from Huairou to Huanghuacheng (45 min, ¥5). Total: ~2.5 hours, ¥12. On weekends there are direct tourist buses from Dongzhimen (¥40 round-trip). A DiDi from central Beijing costs ¥200–300 one-way.
Late May to mid-June for yellow wildflowers. July–August for kayaking (the reservoir is swimmable). October for autumn foliage reflecting in the water. Winter is quiet but the reservoir freezes and the wild section is icy.