The most detailed section of the world of Yarth is the Istuban Basin and the Eastern sea.

• The Eastern Sea

• Carbean Islands
  • Ancient Grain Island
  • Baguette Island
  • Croissant Island
  • Doughnut Island - The island of the capitol city
    • Doughnuthole - Capitol of the Mageocracy of the Seven Emperors
    • Atkin's Mouth - A cavern located below the lagoon of Doughnut Island.
  • Fortune Cookie Island
  • Pecan Sandy Island
    • Penicillin
  • Naan Island
  • Pizza Island
  • Stromboli Island
  • Volcano Island

• Crossbones Island
  • Slaver's Bay - Home of the slavers of the Eastern Sea

• Mirshum Island

• Lockjaw Island

• Istuban Basin
  • Kingtown
  • Lake Ozark
  • The Residence

• Kingdom of Sylvania
  • Traverse
  • Drammamine

• The Underdark

• “Jerry's Island”