I would have liked to see the grafitti hwy, but it has been covered, so i give 4 stars.
It was neat to visit the area though. There are still smoke vents you can park along big mine road and take a 2 min hike and see up close.
If you drive just down the road from the smoke vent, there is a very active geyser that is also right next to the street. It smells like sulfur even and was warm.
The smoke vent was also quite warm.
Over all an interesting area. Worth the stop for sure.