Where is the largest chess set in the world?

This chess set is located in Medicine Hat, Canada.

This is an outdoor permanently surfaced GIANT Chess Board, with useable GIANT wooden chess pieces, conceptualized and developed by Dr. Bill Taylor and members of the Medicine Hat Chess Club. The board is located between the Court of Queen's Bench Building and the Medicine Hat Public Library in the core of beautiful downtown Medicine Hat. In 2009 it was officially certified as the World's "Largest Chess Set" by Guinness World Records.