"Where the three biomes meet..."
The Temple of The Three Biomes is the central temple that Drake and Armen go to after they've acquired the Sacred Diamonds from the three temples. It is situated in the intersection point of the Jungle, Desert, and Snow Biomes.
The Haunting: Second Life Edit
Drake and Armen use this to navigate through The Three Biomes, mainly for the Snow and Desert Temples.
The two also return here after acquiring all three of the Sacred Diamonds from each of the temples. After activating it, it opens up to a mysterious cave.