Near Sliema Promenade. With a stay at Diplomat Hotel, you'll be centrally located in Sliema, steps from Tower Road and within a 5-minute walk of Sliema Promenade. This upscale hotel is 1.8 mi (2.9 km) from Dragonara Casino and 4.1 mi (6.6 km) from Upper Barrakka Gardens.