Tianxin Pavilion sits atop a surviving section of Changsha's ancient city walls, the tallest point on the wall circuit at about fifteen metres above street level. The pavilion itself — a three-storey wooden structure in Ming-dynasty style — dates from the original city fortifications and has been rebuilt multiple times, most recently after damage in World War II. The views from the top extend over the old city centre and give the best sense of Changsha's original urban footprint.
The surrounding Tianxin Park contains the longest surviving section of the old city wall, about 251 metres. Walking the wall parapet and examining the different brickwork of successive rebuilding campaigns — Han, Tang, Ming, and later periods all left their marks — is the main reward of a visit. Entry to the pavilion costs ¥50. The park is in the southern part of the old city, about fifteen minutes' walk from Wuyi Square. Particularly worth visiting at dusk when the pavilion is lit and the old trees in the park take on a different quality.