[Answer] We sought out all the creepiest places in California for West Coast adventurers with supernatural interests. We learned that 12,000-year-old bones were discovered deep in a cavern in Vallecito, likely those of prehistoric people lured to their death by what?

Step 1 : Introduction to the question "We sought out all the creepiest places in California for West Coast adventurers with supernatural interests. We learned that 12,000-year-old bones were discovered deep in a cavern in Vallecito, likely those of prehistoric people lured to their death by what?"

...1. delicious fruity smells emanating from fungus growing on the cave walls 2. echoing moans from wind passing through the cave 3. mesmerizing glowing bacteria in the stream running through the cave 4. enormous selenite crystals emerging from the walls of the cave

Step 2 : Answer to the question "We sought out all the creepiest places in California for West Coast adventurers with supernatural interests. We learned that 12,000-year-old bones were discovered deep in a cavern in Vallecito, likely those of prehistoric people lured to their death by what?"

The correct answer is echoing moans from wind passing through the cave.,:

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