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Yunyang UNESCO Global Geopark, located in southwest China, showcases landscapes shaped nearly 250 million years ago that record the disappearance of an inland sea and the unique terrestrial environment that emerged in its place. The region is best known for its dinosaur-rich fossil deposits and is home to the remarkable ‘Great Wall of Dinosaur Fossils’, an 18 km stretch of rock layers packed with fossils dating back nearly 170 million years. In one extraordinary section, around 5,000 dinosaur fossils are exposed offering unique insights into dinosaur evolution during the Middle Jurassic. The geopark is also home to dramatic karst landscapes – distinctive rock formations shaped by water over time – including one of the world's deepest sinkholes, which plunges 335 meters and serves as a key research site.