A drive past the airport near Mammoth Lakes took us to Hot Creek geothermal pools where boiling water bubbles up from the creek bed.
The pools are beautiful but deadly, we thought we’d be able to walk right down to them, but they're fenced of and notices warn that the ground is unstable and that people have died falling into the boiling water.
Although having said that you could easily get through the fence, and we saw a few people do just that. We did wonder if the water would make a good cup of tea, but as the possibility of being boiled alive if we fell in, didn't appeal to either of us we stuck to the path.
About 3 miles below the surface is a chamber of red hot magma.
Scientists believe that it takes about 1,000 years for the heated pressurised water to reach the surface.
It was a really interesting place to visit.
Have fun, we are!