====== Underworld ====== 

<data !special_option>
Description [wiki]      : +3 zones, [[Solidified Core]] climate
Image [image]           : ic:underworld300x300.jpg
Applies To            : Any Medium or Large planet
Cost                  : 1 special points
Builder: orbital
</data>

A significant portion of buildings is made below the surface. This is possible due to the core of your planet being solid and provides more space. The planet with underworld has 3 extra zones, and gains the [[Solidified Core]] climate as an extra climate (the planet now allowing up to four climates).

Note: the 3 zones are normal zones in all aspects, except (:rock-mass) cost. As such, you have to pay extra (:bio-mass) for [[atmospheres]], [[oceans]] and [[natural life]].