Formerly,Sansiantai was a narrow and elongated cape into the ocean. When the neck of the cape was eroded by the tide,the rest of the cape was disconnected with the land and became an island. It is said that three gods,named Li Tieguai,Lu Dongbin and He Xiengu visited here and left three pairs of footprints. The isolated island remained unaffected by human civilization and preserves abundant seashore plant species,and was thus claimed a natural reserve later on. There is also a famous eightarch cross-ocean bridge,a great spot to watch sun rising over the Pacific Ocean.