Craters of the Moon is a huge landscape of lava. Everything is covered with lava (of several types) and on the older stuff, vegetation has started to grow.

According to the geologists, the most recent eruption here was about 2100 years ago, and before that 4000, 6000, 7000, 8000, and 10,000 years ago. It would seem we're due :-)

The landscape is stark and yet beautiful, with all kinds of plants trying to re-establish more than 2000 years since they were completely wiped out.

This whole part of Idaho (Thousands of square miles) is basically lava flows. You can see the lava at most creek beds and highway cuts. But there's topsoil on a lot of it - those flows are earlier than the stark, new flows here at Craters.