This week Julius and I look at games with modular boards.  It's one of my favorite "mechanics" in a game.  I really like games where the setup is different each round and it affects how the game plays out.  The bigger the impact, the better!
 
Clank! In Space (BGG)
Under Falling Skies (BGG)
Keep the Heroes Out (BGG)
Descent (BGG)
7th Continent (BGG)
Forbidden Island (BGG)
PARKS (BGG)
Five Tribes (BGG)
Magic Maze (BGG)
Carcassone (BGG)