Taihu stone (Chinese: 太湖石) or porous stone is a kind of limestone produced at the foot of Dongting Mountain (洞庭山) in Suzhou, which is close to Lake Tai. Due to long-term surging by water, this kind of stone features pores and holes.^[1]

These stones are very popular in gardening, following the concepts of traditional daoism and juxtaposition, themes very popular in that style of decoration.