Changde Poem Wall is a 3-kilometer-long anti-flood dyke alongside the Yuanjiang River, which is engraved with poems, calligraphy works and paintings. Thus, it is listed as the longest wall with engraved art in the Guinness Book of World Records.
There are artworks from many famous Chinese artists and outstanding figures such as Mao Zedong and Qi Baishi.
Chinese source: hunan.gov.cn