Scythe: Modular Board - Rules of Play says:
The Scythe: Modular Board expansion allows you to change the landscape of Eastern Europa every time you play Scythe thanks to its double-sided game board and four large double-sided landscape tiles. Faction locations, i.e., the home base tiles, change each time you play. The modular board adds a drafting element to set-up, along with a variant for a tighter map at lower player counts.
Featured Components:
• 1 double-sided board (624x818mm, same size as the standard Scythe board)
• 4 double-sided tiles (7 hexes per tile)
• 8 home base tiles
• 8 structure bonus tiles
• 1 rulebook (11 languages)
• Automa rules for solo play