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Five minutes before a thunderstorm:
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Ancient petrified sequoia...
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... and a modern oak tree:
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Avenue of the Giants - giant redwoods in northern California:
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This old redwood is more than 1,000 years old. The markers show the tree rings that correspond to various events from history:
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Our rental car seems so small compared to those trees:
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Mount Shasta:
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Burney Falls:
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In Lassen National Park:
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Lava Beds National Monument. Those slopes are made of lava:
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Lava beds:
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Obsidian stones. Obsidian is rapidly cooled lava:
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