Thieves' Town

Thieves' Town is located in the Village of Outcasts. It is located at the Dark World equivalent of the Weathervane. In ALttPR it is likely the first dungeon you'll visit upon gaining access to the Dark World if you have access to the region.

Note: A Small Key can be located inside the Thieves' Town - Big Chest as it's the only thing locked behind a Small Door. Remember that gaining access to the Thieves' Town - Big Chest inside the room requires the hammer.

Vanilla

You find the Titans' Mitts here. The boss is Blind.