Have you ever played GTA Vice City? Well, this is a memory palace around Vice City that has 3x52 stops. Enough to cement to memory at least three decks of cards or 312 digit numbers. Something, huh? Enjoy!
Update: Eureka! A new memory palace course is available on: http://www.memrise.com/course/316334/gta-san-andreas-memory-palace/ Scope that out!