《徐霞客游记·粤西游日记三十五》
越过山脊又向东，升登在山坡间，路两旁都是悬坠的陷井，或深或浅，都是土山，石孔层出不穷。
逾脊又东，升踄陂陀，路两旁皆坠井悬窞，或深或浅，旨土山，石孔累累不尽。
I crossed the mountain ridge and again headed east, climbing a winding path on the mountainside, with deep and shallow sinkholes on either side, and earth banks and stone pits protruding from the ground.