And water! Everywhere. Running across huge out wash plains. Rivers, streams. Hot springs. Water bubbling up from the ground. Water leaping out of the ground. And water falling from heights.
Seljalandfoss, the water fall you can walk behind.
Just like that.
Svartifoss, the black waterfall
Not all the water goes down. While the 'Grand Geyser' only erupts occasionally now, it's little cousin Strokkur puts on a show every 5 minutes or so: