The natural gas seepage occurs due to tectonic activity that fractured the rock, allowing methane trapped in the underground strata to reach the surface.
The flames were officially documented in the 'General Annals of Taiwan' during the Qing Dynasty as one of the island's eight great sights.
The fire is naturally occurring and is not a manufactured gas supply, though it has been occasionally managed to ensure it stays lit for visitors.
The surrounding rock is primarily composed of Miocene sedimentary strata, specifically limestone and shale formations.
Historical records indicate the site was once referred to as the 'Water and Fire Hole' in older geological surveys of the Formosa region.
Shuihuo Tongyuan, or the Water and Fire Cave, is a unique natural geological phenomenon located on the slopes of Mount Jianshan in Tainan's Baihe District. Natural gas continuously emerges from a crevice in the rocky cliffside, sustaining a perpetual flame that burns alongside a flowing natural spring. This dual output occurs because the natural gas deposit and the spring water share the same geological layer, allowing them to exit the limestone rock simultaneously. The site is a well-known feature of the Siraya National Scenic Area. The rock face is situated within the Guanziling hot spring resort region, historically known for its mud springs. The flame has burned for over three hundred years, documented as early as the Qing Dynasty. A small temple stands near the site, reflecting the historical cultural reverence for the phenomenon.
The raised viewing platform directly opposite the rock crevice offers the best framing for both the water and fire elements.
Visit during dusk or evening to see the flames clearly against the gathering darkness.
Wear comfortable, non-slip footwear as the surrounding paths can be damp due to the spring water.
Combine your visit with a local mud hot spring soak in the nearby Guanziling area.
Do not expect a large canyon or cave system; this is a single localized rock face observation point.
Do not attempt to touch the flames or throw objects into the crevice.
