Lost Grounds are usually areas of the game that have no monsters and are rumored to be unchangeable by even the game's creators. Many mysterious things are said to happen in Lost Grounds such as a 'Girl in White' appearing in DELTA: Hidden Forbidden Holyground at midnight. There are many known Lost Grounds in 'The World'. Many of them have 'Tri-Edge' symbols somewhere in them. The most visited Lost Ground is called Hulle Granz Cathedral but many know it simply as 'HFHG'.