Cavernous death metal is a subgenre of heavy metal music that is characterized by its use of deep, guttural vocals, fast-paced guitar riffs, and heavy bass lines. The genre is known for its dark and ominous sound, which is often achieved through the use of reverb and other effects that create an echoey, cavernous sound. Cavernous death metal is popular among fans of extreme metal and is often associated with themes of death, darkness, and the occult.