Kiyotsu Gorge and the Tunnel of Light, Niigata prefecture
Niigata prefecture’s Kiyotsu Gorge is a massive natural marvel with volcanic columns, called columnar jointing, overlooking a dramatic river view. After the walking trails were deemed unsafe and closed to the public in 1988, Ma Yansong and the MAD Architects team built the Tunnel of Light, a 750m-long tunnel leading out to the gorge, so visitors can safely view its panoramic beauty.