Nusa Lembongan is surrounded by a beautiful marine park; the magnificent scenery includes white sandy beaches or limestone cliffs dropping vertically into azure seas with the most incredible view back to Bali and Mount Agung. At only 4km (2 1/2 miles) long and 2km (just over 1 mile) wide, you can walk round the island in less than 4 hours. Note: Of the three islands detailed here, Lembongan has the most extensive facilities for scuba diving.