Among these is toba caldera , the site of the largest eruption in the past 2.5 million years .
其中的托巴火山（湖）是250万年来，地球上最大的火山爆发的发生地。
A cold-water caldera lake occupies the western half of the summit
而顶峰的西部则为火山湖冷水所覆盖。
Yellowstone lake is one of the largest high-altitude lakes in north america and is centered over the yellowstone caldera , the largest supervolcano on the continent .
