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Introduction to Tianxin Cave: It is located between the mountainside of Duguduo at the southern foot of Baotianman, in the center of the cliffs. It is known as "one of the unique caves in China" and "a natural underground art palace". The entrance of the cave goes straight down, like the heart of a mountain, so it is called "Tianxin Cave". There are two connected halls in the cave, covering an area of about 8,000 square meters. The height of the cave wall ranges from 10 to more than 30 meters. It is grand, wide and very spectacular. The colorful patterns naturally formed on the cave walls are natural and simple, with exquisite patterns and ingenious workmanship. There are a dazzling array of stalactites in the cave, which look like things and animals. They are arranged in an orderly manner and look like gods.