"I can't even be certain there's been anyone other than monsters inside that castle in the last fifty years," Sidon informed Lana, his smile for her question a bit sad. "Perhaps a few Hylian treasure hunters, but if they've been successful, I've yet to hear of their exploits. Which is not, of course, to say that they weren't successful; Hylian tales don't usually reach Zora's Domain in general. So there's no telling what might be discovered inside that may be of value or interest."