Hatshepsut Temple
From CivIdle Wiki
Hatshepsut Temple is a Wonder that provides two unique effects. First, it reveals all water tiles on the map. Second it makes it so that all Wheat Farms get +1 Production Multiplier for each water tile adjacent to the farm. It has a base cost of 
Stonex57.8, 
Woodx57.8K, and 
Copperx19.26K.
It is a useful Wonder for the early game due to it making Wheat Farms more efficient and helping identify the best location to place them.