Halong Bay is one of the wonders of Vietnam. Here Ha Long Bay has many large islands, sparkling caves, and splendid caves. Entering our cave is like being lost in a magical and magical world. On the high and wide arch of the cave, there are countless round indents like the footprints of hundreds of thousands of giant elephants. Below the ground, the rocks, the rocky mountains grow up like a lance. They gather together to form a natural forest on the ground. Red and shimmering. What a wonder of Vietnam.