Here lies the beach of mysteries. This beach is cloaked in black, given that it's sand is actually fine broken up granules of obsidian. At noon each day the beach is set aglow by the sun's light, given the fact that obsidian is highly reflective. At midnight it glows by the light of the moon. Perhaps the time it is the most alluring is during a lightning storm, when the obsidian turns into a light show.
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Black gold
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Submerge