Towering over the historic Portsmouth Harbour, this 170m (558-ft.) tower has become one of the biggest attractions of southern England. On a clear day, you can see for 37km (23 miles) in three directions. You can glide to the top in a panoramic lift or else take a high-speed internal lift. The panoramic elevator glides to the top in 90 seconds, the internal elevator in 30 seconds. Sightseers experience the thrill "walking on air," or daring to cross the largest glass floor in Europe. On the top deck, Crow's Nest, visitors are exposed to the elements. In addition to the open-air view, there is a trio of glass-enclosed viewing decks. On-site is the Tower Café & Bar, where you can order and enjoy coffee, cakes, and sandwiches while soaking up the view.