 In addition, Ha Pak Nai used to be an oyster bed, thus, there is still remains of oyster shells all over the flat.Apart from the natural scenic spots, couples of relics can be found in Pak Nai.The most remarkable one is the fortified structure at No.55 Ha Pak Nai, which is a declared monument due to its connection with revolutionary movement under the leadership of Dr. Sun Yat-sen.