Son Moc Huong Cave, more popularly known as Moc Chau Bat's Cave, is a natural art and treasure bestowed upon the place.

The cave is stuated 150 kilometers away from the National Road No. 6 in Son La City. In front of it is a beautiful valley with seven small gem-like mountains.

Legend has it that a holy dragon once flew toward the East Sea. Upon reaching Son La, the place had such a beautiful terrain, cool wather, and serene view that the dragon was so drawn into it he decided to settle in the area. Today, people believe that the sheer number of mountains surrounding the valley is the dragon itself. And with the colors of the mountains changing at different times of the day, who knows the story might just be true?

The seven gem-like mountains in the valley is said to be the dragon's thanksgiving gift to the land for having been its home for a long time. The mouth of So Moc Huong Cave is believed to be the dragon's mouth watching over the treasures.

Inside the cave are stalactites and stalagmites producing different colors that resemble a rainbows. Some stalactities reach a length of almost 20 meters and come in different, interesting shaps such as a fairy, lion, elephant, tiger, lizaed, eagle, floating clouds, and even money tree. The shape are so spectacular that it is almost impossible to believe they are natural and not man-made to achieve such beautiful forms. The ceiling of the cave can reach up to 30 meters high and several small ponds can be found inside.

Son Moc Huong Cave is more known to tourists as Moc Chau Bat's Cave for the same exact reason - that it is the home to thousands of bats. But this doesn't stop visitors from continually coming to explore the cave and discover its beauty for themselves.