Home to boiling mud pools, steaming vents, beautifully coloured volcanic rock and natural thermal pools. (greatlaketaupo.com)
Home to boiling mud pools, steaming vents, beautifully coloured volcanic rock and natural thermal pools, it's a haven for those looking to explore something new. (greatlaketaupo.com)
This is Bumpass Hell, a valley of bubbling mud pools in the heart of the Lassen Volcanic National Park in northern California. (newscientist.com)