The Bat Cave lies within a ravine in the northern part of Sanmin Village, a large naturally formed cave. Known as the "Veil of Water Grotto," it gets its name from the springwater cascading from above at its entrance. Due to its rugged and primeval terrain and proximity to the ravine, it has attracted a large population of bats, giving it the name "Bat Cave." The red soil covering its cave floor today is a result of accumulated bat droppings from the thousands that once inhabited the area, a testament to its once-thriving ecosystem and adding to its air of mystery.
To reach the Bat Cave, one must travel to the terminus of Taoyuan Route 114, which serves as the entrance to the trail accessing the cave. The trail is approximately 600 meters long, with a gentle slope and paved in stone bricks. A 20-minute walk suffices to reach the destination. The path is lined with towering trees, offering a cool and refreshing walk. Along the way, visitors can enjoy abundant natural ecology, and if they need a break, wooden benches dot the trail for rest. The path also features intricate tile mosaics of bat patterns on the ground—an amusing touch sure to bring a smile.
Moving further along the trail for about 444 meters leads to a helix-designed viewing platform, with curved stairs guiding visitors upward for panoramic vistas of the lush mountain range—ideal for sweeping away one's worries. Descending via a narrow path behind the refreshment pavilion at the viewing platform reveals a staircase trail alongside Sanmin Stream, where the cave, with its wild and ancient terrain, is hidden. Before the cave's mouth lies a water pool and two cascades—a large waterfall and a smaller one—each about 50 feet high. During non-drought seasons, the water sprays in showers and echoes in melodic ripples all around. The wooden platform reveals the deep pool, around 3 meters in diameter, carved from the water’s relentless pounding. Cool and inviting, it is a perfect place for a summer retreat.
The cave opening, semi-circular in form, is nestled among the cliffs by the stream. The entrance stands 20 meters high, with the cave itself approximately 50 meters wide and 50 feet deep. Sliding into the cave, its interior arcs into a half-moon shape resembling a theatrical stage, vast and unique. The cavern spans a generous area, large enough to accommodate a thousand people—rare for such a naturally formed structure, offering an otherworldly sense of discovery.
Though the bats have since migrated elsewhere, the cave, with its profound and enigmatic terrain, continues to attract countless visitors eager to explore this remarkable natural wonder.