Discover Longbi Gully, a hidden natural wonder in Dongguan! This karst landform creates surreal valleys where crystal streams dance through whimsical rock formations. Perfect for hiking adventurers, follow primitive trails to uncover cascading waterfalls and wild flora/fauna. Don't miss capturing the sunlight piercing through canyon crevices – locals will gladly share mythical tales about the 'Dragon's Nostril' that gives this place its name.