If you ask Tailuge the most beautiful attraction is which? You can say without hesitation: Swallow mouth. This trail is about 500 meters long, one side is the middle road, one side is the fog stream, and the cliffs on both sides of the bank are distributed many different shapes of caves, these caves are swallows' nests, so the name "swallows mouth". However, now because of the interference of tourists, the swallows have basically disappeared, but our luck is really good, actually saw 1, and entering the swallow mouth trail to wear a helmet, because there are many tunnels, there may be falling stones.