Uncover the wonders of Immortal Cave (Xianren Dong), a breathtaking limestone cavern nestled in Beijing's outskirts! Marvel at millennia-old stalactites glowing under your flashlight as you squeeze through narrow passages - don't miss the surreal 'Stone Bamboo Forest' where glittering formations resemble celestial beings' fingers. Perfect for adventure seekers craving off-the-beaten-path thrills!