Arkham West Riddles - Batman: Arkham Asylum Guide - IGN

Just above the locked door to Arkham North in the passageway between the two areas, pull down the weakened wall up high with your Ultra Batclaw and grapple up

Batman Arkham Asylum - Arkham Island, West Riddler's Challenges

Arkham Mansion Riddles - Batman: Arkham Asylum Guide - IGN

Arkham Mansion Riddles - Batman: Arkham Asylum Guide - IGN

Arkham Mansion Riddles - Batman: Arkham Asylum Guide - IGN

Arkham Mansion Riddles - Batman: Arkham Asylum Guide - IGN

Arkham North Riddles - Batman: Arkham Asylum Guide - IGN

Steam Community :: Gids :: 100% Achievement Guide: Batman - Arkham Asylum

Arkham North Riddles - Batman: Arkham Asylum Guide - IGN

Batman: Return to Arkham Asylum - Riddler's Challenge - Arkham Island West (All Collectibles)

Batman: Arkham Asylum - pc - Walkthrough and Guide - Page 76 - GameSpy

Arkham Mansion Riddles - Batman: Arkham Asylum Guide - IGN