The game's own map, every place at its in-game position. The list on the left has three tabs — places, uber bosses, chests & other sources; click an entry or a marker on the map to see its drops and odds. Search an item to light up everywhere it drops, and hover an item in a drop list for its stats.
Blue = zone · red = boss dungeon (the act boss stands on it) · gold cross = the act's dungeons · badge = town · gold chest = Giant Chest zones (player-reported, S10 XP farming: 1-5, 3-3, 3-4, 4-3, 5-2, 6-4; toggle with the Chests button). Drag to pan, wheel to zoom; the act buttons jump straight there.
Map, markers, boss and item art are the game's own files, copyright Panic Art Studios. Marker positions, routes and drop odds are compiled by this site. Unofficial data, may change with patches.