The warren is located north of the spawn house. The area between the spawn house and the warren has a wheat and sugar cane farm, a cow pen, and a sheep pen, along with various other things.
Automatic Potato/Carrot Farm
Accessed through a tunnel off of the warren
All the world's netherside portals are joined to the nether network, located just below the upper bedrock layer. The 8 main tunnels branch off of the nether nub located at nether coordinates 0,0.
Funland Village (a.k.a Villager Repository)
Located over the ocean between the warren and SavannaS's Wayward Base. (See librarian trades for the available enchanted book deals).
Not much yet, check back later.
Zombie XP Farm
Located near spawn off of the warren
Skeleton XP Farm
(under renovation) Located near 0,0
Double Cave Spider XP Farm
The Cave Spider farm will be renovated to include a crushing mechanism for the spiders, and to improve XP collection.
Blaze XP Farm
By far the most effective XP farm. Go here for the quickest XP yield. Located off of the northwest nether network tunnel.