Here is how partially discovered map looks like.

I've created this in map editor of my favorite game - Civilization V.
Due to some limitations of map editor, map is slightly rotated clockwise.

White parts of map are unknown to me (covered in fog).

Rewards from towers are:
Tower 1 - Bird
Tower 2 - Pink stone
Tower 3 - Rabbit
Tower 4 - Dog
Tower 5 - Power pack 3 days
Tower 6 - Cat

Update: Location of 5 days Business pack is now marked on map too (credits to Macwin for Info).
Update 2: Added another Business pack, Q5 DS  and 3 gems locations