Haunted House

Greg and Rowley's Haunted House was a haunted house made by Greg and Rowley in the first book and the online version.

Alleys

 * Hall of Screams
 * Lake of Blood
 * Bottomless Pit
 * Rat Tunnel
 * Maze of 1,000 Skulls
 * Knife Alley
 * Hand Hall
 * Acid Lake

Trivia

 * It is unknown why the boy in the poster has a moustache.