As usual highlight the spoilers below to see them.
Spoiler 1: When fully revealed the map will look like a person.
Spoiler 2: There is a big rock blocking the right leg. Click on that rock to reveal the secret area.
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2