Hi, for those who can read Chinese, this is a voyage through the lower realms by a Delog. In Tibet, some accomplished practitioners can temporarily die and travel to other realms to bring back their experiences for teaching others. These type of practitioners still exist today.
This account is in 20 parts and very graphic and detailed. It is mainly on the hell realms and what kind of karma causes rebirth there.
http://www.zhibeifw.com/fjgc/dyyj.php