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Town
A Town is an area found in each Act that serves as a central hub for completing quests, purchasing or selling items to vendors, interacting with NPCs, or accessing a player's stash.
Waypoints
All towns contain a waypoint that is automatically unlocked upon entering the town instance, unlike waypoints in hostile areas that require the player to walk near them to unlock.
Using a Portal in any Act area will take the player to the town for that Act, or the previous Act's town if it has not yet been unlocked.
Well
A well is an interactable object found in towns that can fully recover Life and Mana and refill charges for equipped flasks.