If it’s the body of Venus and the complexion of Cleopatra you desire, abandon modesty to wallow in thermal waters at this palatial 19th-century marble-and-mosaic-adorned spa. As Mark Twain said, ‘after 10 minutes you forget time; after 20 minutes, the world’, as you slip into the regime of steaming, scrubbing, hot-cold bathing and dunking in the Roman-Irish bath.