Opportune Odors Horseradish Factory is, as its name implies, a horseradish factory located along Lousy Lane, and is responsible for causing the smell of horseradish in the surrounding area. It produced horseradish as an antidote to the Medusoid Mycelium.
Long ago, the factory was the last big order of the Lucky Smells Lumbermill. Kit Snicket, when writing to Gregor Anwhistle, mentions the factory so that Mr. Anwhistle can dispose of the deadly mushrooms and not use it against V.F.D.'s enemies. Unfortunately, Gregor Anwhistle never opened the letter. He later perished in the fire that destroyed Anwhistle Aquatics.
- The Reptile Room (Mentioned)
- The Grim Grotto (Mentioned)
- The Penultimate Peril (Mentioned)
- The End (Mentioned)
- Lemony Snicket: The Unauthorized Autobiography (Mentioned)
- Lemony Snicket's A Series of Unfortunate Events (video game) (PC version only)