Hi Ashleigh,
It looks like something has gone wrong with your time of day settings ... one solution is to import the default time of day (that comes with CryENGINE) to your custom level.
To do this open the time of day editor (Terrain > Time of Day) then click the folder icon (third from the top left) and navigate to the "Editor" folder (which is in the root directory of your game folder) then select "default_time_of_day.xml
This will put the time of day back to the standard settings.
The users of your monuments are "students of Architecture, Architectural Computing and Engineering" so while at times they might not appear human, I can assure you they are.
Cheers