Continuing on with the road trip to Myvatn. Outside Myvatn a bit are two amazing waterfalls, Dettifoss and Selfoss, practically right next to each other.
Dettifoss has a near permanent rainbow above it due to the spray coming off the waterfall. This is the waterfall from the intro to Prometheus. Unfortunately without a helicopter you can't get the angles they have in the film.
These were naturally occurring rocks next to the falls. Beautiful.
This was a bit before we went to Dettifoss. I don't remember the name of this area but there were lots of geothermal vents spewing smoke into the air. So cool. They heavily advise staying on the paths as you never know when your foot is going to sink into a boiling mud pit.