From The Mythos Wiki

Stonehill

Stonehill is the main starting town in Mythos. When you first start the game you have to complete the Blackmarsh quest solo. Once this quest is complete you are rewarded with a map to Stonehill. The map can be memorised and inserted onto your maps screen. Once memorised, the player can use the portal to head to Stonehill which is now indicated on the central location on the main map.

Stonehill is the first location where you will find other real life players and is also the location of many key NPCs who will give you quests as well as trading, crafting and healing. In Stonehill you will also find your stash box, a place to store any items you wish to hold onto for future use.

Tulin's hope

The second town. It is located at the edge of Bloodbristle Heath.

Mistglade

The third town. It is located on top of Umbral peaks. The easiest way to reach it is to talk to the Skyship Captain and he will transport you without risks (must be level 18)