The Depths of Time
The Depths of Time was a limited time adventure in the Voyage of Wonders. It has since been added as a permanent adventure to the Wandering Balloon. This can be accessed through the Peaks of Time building.
The Depths of Time Map
This is a map guide on how to obtain every single treasure in the adventure.
Note that it takes at least 2 runs to obtain everything, namely the last big treasure.