Fumaroles, boiling cauldrons, hot mud and springs — the geothermal activity is evident everywhere here.

火山喷气孔、沸腾汽锅、热泥浆和温泉——地热活动在这里随处可见。

So driven by the fumaroles, these caves are really active.

在喷气孔推动下， 这些很活跃。

Where these arteries come to the surface, these earth arteries, we'll get geothermal manifestations: fumaroles, hot springs and in our case, the boiling river.

那些在地球表面”动脉“， 就是地热表现： 喷气孔，温泉，正是我们这里沸腾河。

It includes a network of geothermal areas, highlighting geysers such as the Old Faithful Geyser, the most popular in the world, hot springs, and fumaroles, among other attractions.

它包括一个地热区网络，突出间歇泉，例如界上最受欢迎老忠实间歇泉、温泉和喷气孔等景点。