Tianmen Mountain National Forest Park is named after the natural wonder “Tianmen Cave”. Tianmen Cave is not actually a cave but a hole in the mountain that formed naturally. It is often filled with fog so climbing the steps to reach Tianmen Cave will give a feeling of ascending into the heavens. During the cable car ride, you can overlook the 99 winding roads and beautiful mountain scenery. The bold can also take a walk along the glass skywalk and experience the thrill of "walking on air".