The Longyou Caves in China were carved out 2000 years ago. But no one knows by who, or why, or even what they were for. Could this incredible accidental find by some farmers be an alien scultpure? Or is it just another weird ask from an Emperor? To help you Chief Detectives with this case, Athena and Tiernan dig deep into all of the evidence. Brought to you by Small Wardour, makers of some of the best podcasts for kids. *** If your chief detectives want to hear more from the investigations, including more compelling evidence and extra fun facts, then you can become a paid subscriber of the show. Just click Subscribe on Apple Podcasts or visit patreon.com/bustortrustpodcast to get access to weekly bonus episodes, ad-free and early listening and exclusive extras. Your support will help us to investigate even more amazing mysteries. Learn more about your ad choices. Visit podcastchoices.com/adchoices