Karst cave at Jizhou District of north China's Tianjin
Xinhua
1575647206000
Tourists watch stalactites in a karst cave at Jizhou District of north China's Tianjin on Dec. 5, 2019. (Xinhua/Ma Ping)
Aerial photo taken on Oct. 31, 2019 shows the entrance of a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)
Photo taken on Dec. 5, 2019 shows stalactites in a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)
Photo taken on Dec. 5, 2019 shows stalactites in a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)
Aerial photo taken on Oct. 31, 2019 shows the entrance of a karst cave at Jizhou District of north China's Tianjin. (Xinhua/Ma Ping)