Guitang Town has caves and underground rivers of typical Karst Landform.

桂塘镇境内喀斯特地貌密布，溶洞遍及，阴河纵横。

youdao

Exploring unknown caverns and navigating underground rivers is what makes caving so thrilling.

探索未知洞穴，航行于地下暗河使得洞穴探险分外刺激。

youdao

Erosion by the Yangtze river had formed numerous gorges and construction was dogged by underground rivers and caves.

沿路因长江侵蚀有许多峡谷，而且建设经常被暗河和山洞所阻断。

youdao

Discover the area's wildlife, lagoons and underground rivers at Xcaret Park.

BBC: Daily deal: Mexico for epicureans

They are widely regarded as a world-class natural attraction containing marvellous stream passages formed by three rivers that sink underground on the slopes of Cuilcagh Mountain.

UNESCO: Olympic torch carried through iconic Geopark

This is the water found in lakes, rivers, reservoirs and those underground sources that are shallow enough to be tapped at an affordable cost.

FORBES: Is Water A Better Investment Than Oil?