At the beginning, I heard the grandmother's Penghu Bay singing the sun, the waves, the beach, the cactus, and the old captain. I have always doubted the cactus. Is Wuhu not an island? Does the cactus not live in the desert? Why is there a cactus in Wuhu? And the cactus ice here is so famous? Later, after understanding, it was known that the Dutch originally brought the seeds of the cactus to this small island, but because of the stubborn viability and reproductive capacity of the cactus, it really made it possible to be on this small island by the sea. I saw a lot of cactus in pieces. The large fruit leaf columnar basalt is said to be a volcanic eruption more than 10,000 years ago. The lava is contracted into a pentagonal or hexagonal shape after cooling with water. In the large fruit leaves, the basalt can be seen from the bottom to the top with different stages of weathering. Only here can sigh the magic of nature, so just a few seconds of cooling to form such a strange landform.