Portsmouth, the UK’s only island city, is steeped in maritime history and closely tied to the Royal Navy, with plenty of top attractions to explore. Included in this tour is the Spinnaker Tower, a 170-metre landmark boasting stunning 23-mile views across Portsmouth Harbour, the Solent, the South Downs, and the Isle of Wight. Visitors can enjoy three high-up viewing decks, step out on the exhilarating glass ‘Sky Walk’ at 100 metres, and take in open-air views from the ‘Sky Garden’. Situated by a leading designer shopping outlet, the Gunwharf Quays, the tower is surrounded by over 90 well-known brands, all offering up to 60% off regular prices.