Ancient house
Time-tested construction technique
Construction
Finish
Bonus
Warm fold
Construction
Finish
Secret pasture
Timid animal's favorite shelter
Construction
Finish
Bonus
Prehistoric laboratory
This is something prehistoric scientists could only dream of
Construction
Finish
Bonus
Prehistoric laboratory 2
Construction
Finish
Bonus
Prehistoric laboratory 3
Construction
Finish
Bonus
DNA constructor
Miracle of technology
Construction
Finish
Bonus
Cliff with a nest
Construction
Finish
Bonus
Big ancient house
Upgraded ancient house
Construction
Finish
Bonus
Archeological station
Place of spade or pickaxe
Construction
Finish
Bonus
Ancient chemical laboratory
Source of ancient knowledge
Construction
Finish
Bonus