The Yuan Dadu City Wall Ruins Park[1] (Chinese: 元大都城垣遗址公园), also known as the Tucheng or Earth Wall Park[1] (Chinese: 土城; pinyin: Tǔchéng; lit.

'Earthen Wall'), is an urban park and historic site in Haidian and Chaoyang districts, Beijing.

The park was created in 1988 to preserve the ruins of the northern city wall of Khanbaliq (Dadu), capital of the Mongol-led Yuan dynasty.

Dadu was abandoned in the Ming dynasty, when Beijing was rebuilt and shifted to the south.

The northern segment of the city wall is preserved, and a narrow and long park was created around the ruins of the city wall, located in Haidian District and Chaoyang District.