The lost dwarven mine from Phandelver and Below: The Shattered Obelisk — the one everyone in Phandalin keeps whispering about. A major dungeon within the campaign, not its ending; the story continues well beyond it.

A waterfall feeds a stream that cuts across the northern caves, past a still pool, forge machinery with a smelting furnace, mine cart tracks looping through a tangled tunnel network, and a collapsed room strewn with old bones. To the east, a mould-choked cavern glows sickly green and yellow, while stone ruins with proper walls sit apart from the raw rock elsewhere on the map — remnants of the original dwarven construction.

This is a full dungeon crawl in one map: forge room, mine tunnels, flooded caves, a fungal hazard zone, and several structured chambers, all connected by winding natural passages. Good for a multi-session dungeon with room to split the party, retreat, and come back for a second pass.