Huge. There are many zones for each Realm, which allows the player to gain levels and adventure without running into many (if any) player-character enemies. Then there are Frontiers, which link the Realms together, where you may encounter enemy players.The original zones have been taken as much as possible from the maps of Scandinavia, Wales/England, and Ireland. The English zones have Roman ruins, stone circles, and deep dark forests. The Norse zones are full of ice and pine forests, tundra, and taiga. The Irish zones have rolling hills, magical creatures and places, and a distinctly Celtic feel.