The last two circles of Hell punish sins that involve conscious fraud or treachery. The circles can be reached only by descending a vast cliff, which Dante and Virgil do on the back of Geryon, a winged monster represented by Dante as having the face of an honest man and a body that ends in a scorpion-like stinger (Canto XVII).
Bolgia Ten: Falsifiers, those who attempted to alter things through lies or alchemy, or those who tried to pass off false things as real things, such as counterfeiters of coins, are punished here. This bolgia has four subdivisions where specific classes of falsifiers (alchemists, impostors, counterfeiters, and liars) endure different degrees of punishment.
