Here is a panorama of the Halema'uma'u crater, which is down inside the Kilauea caldera. Native Hawaiians say that Pele lives inside and the lava lake apparently periodically melts (larger size on flickr).
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These are thermal vents on the edge of Kilauea's caldera. Sulfur and other minerals get carried up and deposited by the steam. Very smelly but gorgeous colors.
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Colored lava. This is down in Kilauea caldera:
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