Ten beanbag chairs, each large enough for one person to lie down, fill the dark cavern. A single shaft of light filters through an opening on one side, but it is nowhere near enough to illuminate the deep darkness. Even taking a single step requires carefully following the guide's cellphone flashlight. It is hard to believe that this is part of a tourist attraction visited by around 1 million people a year. Yet this is one of the previously inaccessible sections of Gwangmyeong Cave in Gwangmyeong, Gyeonggi Province. Gwangmyeong Cave stretches a total of 7.8 kilometers, but only about 2 kilometers are routinely open to visitors. The remaining sections have been closed because they require maintenance, have been flooded or are too narrow for public access. Efforts to make use of the restricted areas began in July 2020, when three previously inaccessible sections were opened. This year, two additional sections — one above ground and one underground — are being opened temporarily. The above-ground section is hosting the Dark Immersive Meditation program throughout August, while the under