The Mouth of Hell

The Mouth of Hell is an achievement in Diablo III given for exploring the following areas of Arreat Crater:
 * Arreat Crater, Levels 1 & 2
 * Tower of the Damned, Levels 1 & 2
 * Heart of the Damned
 * Tower of the Cursed, Levels 1 & 2
 * Heart of the Cursed
 * The Core of Arreat
 * Heart of Sin

Related Achievements

 * Wanderer of Arreat