To dream of a crater represents different characteristics and attributes of your personality that are gradually becoming known. This dream may also be indicative of thoughts, feelings, and occurrences from your youth or childhood.
Depth Psychology: A hot, active crater is a warning about too much passion and cravings that are about to erupt.
An extinct crater means you have largely overcome old, painful memories. See Volcano.
Dreams of a crater represent an old wound or emotional scar. See Canyon.