Hub Island

The Hub Island is the first location you can warp to from your Private Island. It is the largest island in the Hypixel SkyBlock world and is the main gateway to many other public islands.

Selecting Hub lobby
You can connect to another Hub lobby using the Hub Selector NPC located next to the portal to Your Island in the centre of the Hub Island. The NPC shows you which Hub Island lobby you're currently on and how many players are in each lobby.

SkyBlock Hub #1 is usually very crowded as it's where most people go when they're looking to advertise their auctioned items or ask for items. The hub is a great place to trade and socialize with other players,

Village
The Village is the center of the hub, consisting of a few houses and shops, as well as various sub locations.

Hub World Map
The Hub World Map is located in front of the player when they get teleported to hub. Its primary use is to navigate the player through the Hub World. The Hub World Map is where players like to go to trade with other players.

Community Centre
The community centre is the area where Mayor Elections take place, and is located directly next to the Hub World Map. In this building it houses and hosts the yearly Mayor Elections and Clerk Seraphine and Elizabeth reside in this building. Elizabeth offers a shop where users can exchange Bits for items, purchase booster cookies, contribute to renovations and the opportunity to purchase rare cosmetics through the Fire Sales that are rarely avaliable for a limited time.

Colosseum
The Colosseum primarily serves as a PvP (Player vs Player) arena for players on the server to use to fight against each other. It is located to the south-east of spawn, following the path around just before the Bank. You can fight in the Colosseum without starting a 1v1 duel, making it a way to have big fights. As of right now, it's currently down for renovations.

Mountain
The Mountain can be found to the south of the Village and serves no real purpose as only Carrots, Fairy Souls and the dungeon hub can be found there.

Forest
The Forest is located to the south-west of the Village. The Lumberjack can be found there and it provides Oak Wood to the players. It also contains a portal to the Floating Islands.

Coal Mine
The Coal Mine can be found to the north, slightly west of the Village. Coal and Cobblestone can be mined there. It also contains a portal to the Gold Mine. The Coal Mine also has the entrance to Catacombs Entrance and the Crypt, but entering the Crypt this way costs 1 Superboom TNT which can be spared by entering through the Graveyard's entrance.

Farm
The Farm is located to the north-east of the Village. The Farmer can be found there, as well as Wheat and a Wheat V Minion. It also contains a portal to the Barn island. The Farm is a known way to earn money as a early game player.

Graveyard
The Graveyard is to the west of the Village. Zombies, Zombie Villagers and Romero can be found there. It also contains a portal to the Spider's Den.

Ruins
The Ruins can be located to the south-west of the Village, to the south of the Forest. It serves no real purpose besides for the Sven Packmaster slayer boss as only Wolves can be found there.

Wizard's Tower
The Wizard's Tower can be found to the south of the Village, between the Mountain and the Wilderness. The Wizard can be found there, as well as the non-functioning Wizard's Portal, which will sometimes teleport you to SkyBlock Limbo.

High Level
The High Level is located south of the Village, to the south of the mountain. Some medium level Skeletons can be found here, as well as a launch-pad reserved for future content.

Wilderness
The Wilderness is located southeast of the Village, to the southeast of the mountain. Tia the Fairy can be found at a lake in the center of the area. The Dark Auction is also located here in the house next to the tavern building..

Hidden Locations
Hidden locations serve no purpose (at the moment). Here are some of them:

Secret Spawn Bunker
Found at spawn. The Secret Spawn Bunker is a mysterious and unknown place in SkyBlock. It is a room with 2 torches, logs in 3 (or 5, depending on how you count) corners, and a staircase leading to nowhere.

Inside High Level Mountain Door
In the High Level there's a large door into the mountainside at   that contains a large central area and 3 areas the come off of it. The central and 2 side areas contain a large number of glass blocks, arrayed in a way that hints at them being used to display objects inside them (although they are currently empty). In the last area in the middle, there are stone shelves, also likely to be used to display contents.

Stone Pillar Hallway
A large hallway with very tall stone pillars with sea lanterns attached to them. Nothing seems to naturally connect to this hallway, or hint at its use. It's located inside the hub Mountain, with one end near the Wizard Tower / over the right wing of the High Level Mountain area (see above), and the other end near the Carrot farm in the base of the Mountain (which is near the Library).