Colossal Maps

Colossal Maps are special maps specifically for finding the Colossals encounters Medeina & Misha.

Use
Colossal Maps require a minimum of 85 Treasure Hunting Skill. Once you have deciphered the map you follow the directions until the map is destroyed & Misha will be 40 yards of where it was destroyed.

Source
Colossal Maps can be found as a drop in Ornate and Devious Treasure Maps.