Alnwick Poison Garden

Behind big black gates, the carefully curated garden contains about 100 legendary killers like Atropa belladonna (deadly nightshade), Strychnos nux-vomica (strychnine), and Conium maculatum (hemlock). Guides explain their deadly properties while keeping ne’er-do-wells and curious children away from the plants, warning them: “Do not touch any of the plants, don’t even smell them. There are plants here that can kill you.”