There are two wells in the main hall, one on each side. On the wells are carved the Green Dragon to the left and a White Tiger to the right, and only the head, but not the tail is visible, restlessly looking to strike out.
正殿兩旁有兩口井，壁上分別刻著青龍與白虎，神龍見首不見尾，彷彿正欲撲出。