Mesmerizing drone footage shows a sharp boundary where two rivers meet in Nanning, China. At the confluence of the Yongjiang River, the turbid water of the Zuojiang River meet the clear Youjiang River ...

The 324-mile Tumen River flows from northeast China to North Korea and, toward its end, Russia, ceded to the Russian Empire by China's Qing Dynasty in the 1860s.

Between two major rivers in China, a vast network of underground caves and rivers crisscrosses below the surface. The caverns are created as monsoon rains wear down the soft karst rock on the way ...