For travelers looking to explore a natural cave museum, a world of subterranean secrets awaits in Southwest China's Guizhou province, home to over 3,000 cave systems.

Zhijin Cave is a geological wonderland, featuring the largest and most completely formed karst landforms discovered in China. The cavern is packed with over 40 types of deposits, including towering stalagmites, massive stone pillars, delicate stone buds, and sweeping limestone draperies.

Zunyi's Shuanghe Cave is one of the longest cave systems in the world. [Photo/ddcpc website]

As one of the longest cave systems in the world, Shuanghe Cave is a sanctuary for unique biodiversity. Its subterranean rivers are home to rare species like blind fish and giant salamanders. Within the underground rift valley scenic area alone, visitors can explore 120 distinct spots showcasing rare helictites, crystal cave flowers, hidden rivers, and roaring underground waterfalls.

Light displays illuminate the Dragon Palace in Anshun city. [Photo/ddcpc website]

Spanning 15 kilometers, Dragon Palace holds the title for the longest water cave in China. Inside, surreal light displays illuminate the cavern, reflecting off the deep, tranquil waters to create an otherworldly atmosphere.

Turquoise waters flow through Shilong Cave in Guiyang city. [Photo/ddcpc website]

Shilong Cave is a natural water cavern with a year-round constant temperature. Crystal-clear, turquoise waters flow through the cave, feeding over 30 terraced green pools and dozens of cascading mini-waterfalls. The cavern also features more than 10 unique clusters of stalagmites and dozens of striking travertine pools.