Crystal Caverns of the Cairn Hills

Adventure description from front page "Outside of the Free City of Greyhawk lie the burial grounds containing the relics of an era long past. Near one of these cairns is the town of Crystalhollow - a settlement of gnomes who mine for precious metals and gems of incredible value. Greed drives them deep beneath Oerth, where they've uncovered something . . . A two-round adventure recommended for characters levels 1 to 9.