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According to the official website of Longwan Geological Park (), it is possible to store luggage at their designated parking lot. However, I would recommend contacting them directly before your visit to confirm this information and inquire about any specific rules or restrictions they may have.
Here’s a quote from their website:
“Luggage Storage: The parking lot can be used for luggage storage.”
Please note that the availability of luggage storage might be subject to change, so it’s always best to double-check with the park directly.