Slightly overtopping Flying-from-afar Peak, Tianchi Peak stands at an altitude of 1,426 meters as the second-highest summit of Tianzhushan. It derives its name from the "Tianchi" (Heavenly Palace) located at its crest. The summit features a stone terrace of about ten square meters, marked by two small rock depressions. Though less than a foot deep, these pools remain filled with crystal-clear water that never dries up, even during prolonged droughts—leading locals to revere them as the "Heavenly Pools."

Geologically, these pools are granite weathering pits. They originate from small indentations where minerals have detached from the rock surface; over time, the combined forces of rainwater erosion and frost heaving have gradually deepened and widened them.

The colossal rock at the summit is split into three sections by fissures about one meter wide. Two natural stone slabs span these gaps, linking the rocks to form what is known as Duxian Bridge (Bridge of Immortals). Legend has it that "all who reach the bridge become immortals."

The outer edge of the summit terrace drops into a sheer precipice, a sight so breathtaking it has earned the name "Heart-Testing Cliff." This vantage point is also the premier location for witnessing the ethereal "Tianzhushan Buddha's Light."