Towers are located in the lanes throughout the map. They are very sturdy defensive structures that deal a lot of damage early on.
They must be destroyed before advancing to the enemie's base.
These structures are found deep in the base and are essential for destroying your enemies shrine. Destroying a barracks will significantly increase the strength of your team's creeps in that lane. There are 2 sets of barracks per lane and cannot be attacked until towers in that lane are destroyed.
World Tree/Sacrificial Shrine
The primary game objective and heart of the legion and hellbourne defenses. The game will end if you can destroy the opposing team's shrine.
Players are allowed to purchase certain consumables that they would normally find at the base, saving them a trip. On Forest's of Caldavar, Observatories are located near the rivers.
Fountain of Regeneration
Fountains provide a safe haven to replenish life and mana without cost and resurrects your hero on death. Enemies that approach your team's fountain will be attacked. The fountain is also home to shopkeepers that allow you to spend gold to purchase powerful items.