Vencel Pugg's laboratory is located in the Flotsam forests. This is where the alchemist takes Geralt to verify the incense formula that the witcher gives him. Geralt can reach the laboratory in one of two ways: either by being led by Pugg while blindfolded, or by convincing Pugg to indicate the location on the witcher's map. Inside the cave, there are a few items of interest: the Formula: Tawny owl and a superb short sword are the most interesting, but there are also some random crafting components.