Forge

General
Forge is a building used to smith and refine ores. It is one of the most important buildings in the entire game, due to it's use in almost everything. Thus, it is recommended to get one as soon as you can, as it is relatively inexpensive.

Looks
The Forge is primarily composed of stone walls and a thatching roof, with a chimney coming out of the top. On the inside, the chimney leads to a small fireplace-like structure, used for refining ore. There is also an anvil, which is used for metal smithing.

Usage
The most important piece of this entire building is the anvil, the only item that can make metal smithing possible. To use it, you must select it along with the other items you are wishing to metalsmith. For example, an Iron Pickaxe would look like this: Anvil, Refined Iron, Handle. Note that the recipe doesn't need to be in that order.