A Merlin Pass is essentially a membership card that provides access to multiple attractions across the UK and can be used over at least 200 days in the year. It is a pass that offers big discounts on attractions in London and the rest of the UK. The Merlin Passes around the world offer a variety of attractions for the whole family to enjoy, from aquariums to theme parks, dungeons to historic buildings. The UK Merlin Annual Pass/Merlin Pass offers access to 29 UK attractions including Alton Towers Resort, LEGOLAND® Windsor Resort, Chessington World of Adventures Resort, THORPE PARK Resort, The lastminute.com London Eye, SEA LIFE Aquariums and Sanctuaries, and more. The pass gets you at least 200 days entry to all of these attractions as well as additional perks and discounts on your days out. Once youve bought the Merlin Pass, youll need to pre-book your visit to the attractions using the barcode and unique pass number provided. The Merlin Pass can be purchased in different types, including Discovery, Silver, Gold, or Platinum. Children under three do not require their own pass, and children over three have the same price as adults.