A mine which one can enter to go from England to Wales.
It's now disused, after a horrific accident caused many fatalities.
The mine is fairly straightforwards. The trouble is that half of the areas are inaccessible at first because they are pitch black. So a lantern must be found in one of the abandoned workstations. An elevator allows access to these different wooden storehouses. Once found, the lantern will be a permanent piece of equipment used by Yuri and his friends. In the darkness, keep an eye out for a Lottery member who survived the mine collapse. Also at one point, Yuri and Karin will encounter the Ring Soul who gives them another Attack Boost.