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

火山喷气孔、沸腾汽锅、热泥泉——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， 这些洞穴真很活跃。

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.

那些在球表面”动脉“， 热表现： 喷气孔，泉，正我们这里沸腾河。

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.

它包括一个热区网络，突出间歇泉，例如世界上最受欢迎老忠实间歇泉、泉喷气孔等景点。