Portonovi & One&Only: Buyer's Guide Quick answer: Portonovi is a purpose-built luxury marina resort at the entrance to the Bay of Kotor, anchored by the One&Only Portonovi hotel and a small collection of One&Only-branded villas. It’s one of the standout addresses in Montenegro real estate today, offering three broad ownership tiers, Marina Residences, Village Residences, and branded villas, with...