Orange Isle (Juzizhou), one square kilometer in area, lies in the Xiangjiang under the 1,500-meter-long Xiangjiang River Bridge. Groves of orange trees are found at the southern tip of the island, and the Heavenly Heart Pavilion (Tianxinge), built on the remains of an old wall dating from the Han Dynasty, commands a panoramic view of the river and of the city of Changsha.