Zhangguan Water Cave Scenic Area, located in Zhangguan Shuirongdong Village, Luoqi Town, Yubei District, Chongqing, is the core scenic area of Chongqing's Zhangguan-Baidicheng Scenic Area. The scenic area has a planning size of 48 square kilometers, of which the core area covers 6.6 square kilometers. The scenic area is adjacent to Changshou Ancient Town in the east, 7 kilometers away from Luoqi Port in the south on the Yangtze River, 52 kilometers away from the city proper of Chongqing in the west, and 15 kilometers away from Liangjiang New Area in the north. It is located between Chongqing-Yichang Expressway and Chongqing-Linshui Expressway with China National Highway 319 (G319) traversing it, enjoying convenient transportation and abundant geographical advantages.
One cave--known as the first underground river in Asia, Zhangguan Water Cave has a total length of more than 20 kilometers, of which 6 kilometers have been developed. The water cave boasts its water and is the nearest and largest natural karst cave on the outskirts of Chongqing. With its fresh and clean air, moderate climate, a constant temperature of 18℃ all year round, and ever-flowing lucid underground river, the cave makes the best place for people to beat the heat in the summer.
Two lakes-- Jinghu (Mirror Lake) in the Yulindong area and Zhenguan Lake in the Zhangjiadong area. The lakes have glass-like water, with luxuriant evergreen trees standing on their sides, dancing in the breeze. At dusk, the sunset casts its afterglow on the fragrant lotus, if you stroll by the lake or boat on the lake, you'll feel like a part of nature.
Three trees-- three 400-year-old to 600-year-old trees, namely, zizyphus jujube tree, ficus virens, and vitex tree, grow in the scenic area. With flourishing crowns and lush branches and leaves, the old trees present strong vitality. Among the three ancient trees, the vitex tree is the most peculiar one, which was supposed to be a low shrub but grew into a towering tree. Its trunk has a "male" branch and a "female" branch, because the "female" branch blooms every year, while the "male" branch never does.
The two branches embrace each other and grow together, known locally as the "couple tree," which is indeed a wonder in the plant world.