From The Heroes of Might and Magic III wiki
		
		
		
|   | Observation Tower as seen on the adventure map. | 
|  | 
-  Shroud is removed from all tiles within 20 tiles of the Observation Tower.
-  The value is 750, the frequency is 100.
-  The number on the map is unlimited.
-  Maximum in the zone: 1 (cannot be increased).
-  Types of terrain: water.
See also