URL：https://media.istockphoto.com/vectors/dungeon-long-medieval-castle-corridor-with-torches-interior-of-with-vector-id1368003085?k=20&m=1368003085&s=612x612&w=0&h=alB30ZHp8O-nTKJib6zYVTTyRmjuhfvIZ-oQQFLGskc=
掲載元：https://www.istockphoto.com/illustrations/dungeon-wall
