There is an underground kingdom in Racha, hidden between mountains. Almost like what Hades had. The temperature there is the same all year around - close to 10 degrees celsius. At the cave's ground flows its water - local Styx - a cold river. To feel comfortable, a traveler needs to have warm clothes, woolen socks, and rubber boots. The kingdom is not as gloomy as Hades, because there is an exit from there. Your guide will bring you back toward the sunlight. The main thing is not to be lost behind. And to have the lamp burning brightly, illuminating the path.