One of these tiles is randomly chosen during setup to be in effect during the game. The rest are returned to the box. Their descriptions are below.
1 - Number of tunnel territories adjacent to your structures. Only count each tunnel once. A Mine does not count as a tunnel for this purpose, and rivers do not break adjacency.
2 - Number of lakes adjacent to your structures. Only count each lake once.
3 - Number of encounters adjacent to your structures. Only count each encounter once. These count whether or not the encounter tokens are still there. Rivers do not break adjacency.
4 - Number of tunnel territories with your structures on them. A Mine does not count as a tunnel for this purpose.
5 - Number of your structures in a row (any continuous straight line is fine; only count the longest row of structures you have; rivers do not break continuity).
6 - Number of farms and tundras with your structures on them.