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"Giardini Poseidon on Ischia is another well-known spa complex and thermal garden that tends to attract many visitors, making it busier than some of the island's quieter spring-fed pools." - Nicky Swallow Nicky Swallow Nicky Swallow is a freelance travel writer who has lived in Florence, Italy for the past three decades. She is a regular contributor to Condé Nast Traveler, The Daily Telegraph, The Guardian, and many other publications. Travel + Leisure Editorial Guidelines