Kiyotsu Gorge (National Scenic Canyon & Ma Yansong’s "Tunnel of Light" Reflection Pool)

Category: Geological Columnar Canyon & Contemporary Architectural Art | Location: Niigata

Carved over millennia by the torrential waters of the Kiyotsu River in Tokamachi, Niigata Prefecture, Kiyotsu Gorge is designated as a National Place of Scenic Beauty and Natural Monument, ranked alongside Kurobe in Toyama and Osugi in Mie as one of "Japan’s Three Great Gorges" (*Nihon Sandai Kaikoku*). The dramatic V-shaped ravine exposes sheer basalt rock faces exhibiting textbook columnar jointing (*Chujo Setsuri*), forged approximately 16 million years ago when submarine magma cooled slowly under intense oceanic pressures into colossal hexagonal stone pillars. To allow visitors to safely experience the treacherous, boulder-strewn canyon without rockfall hazards, the 750-meter-long Kiyotsu Gorge Tunnel was excavated into the mountain cliff. For the 2018 Echigo-Tsumari Art Triennale, visionary architect Ma Yansong and MAD Architects transformed the subterranean passageway into an internationally acclaimed immersive installation titled the "Tunnel of Light." Visitors navigate dimly lit corridors illuminated in rhythmic color bands corresponding to the five traditional Asian elements: wood, earth, metal, fire, and water. The breathtaking apotheosis awaits at the tunnel’s terminal observation aperture, the "Panorama Station." Here, the parabolic vaulted ceiling is completely lined in polished mirror stainless steel, while the floor is covered by a wafer-thin pool of flowing mountain spring water. Visitors wading along the edges to the threshold are silhouetted against the open chasm, creating a flawless, mind-bending inverted reflection where human form, mirror architecture, hexagonal rock palisades, and cobalt skies dissolve into a singular, mesmerizing photographic masterpiece.