Nusa Dua is a peninsula in South Bali, well known as an enclave of high end hotels. Nusa Dua host some of best five star hotels in Bali and is the home of the most popular golf course and a convention centre. Nusa Dua gets a lot of bad press amongst travelers as it is so artificial and sanitised. That does not change the fact though that the beaches here are glorious - white sand, deep, long and safe for swimming.
Nusa Dua is 40 km south of Denpasar, the provincial capital of Bali. Access is easy from the Kuta area (20-30 minutes) and Jimbaran (15 minutes) on the main southern route called Jalan Bypass Ngurah Rai, which becomes Jalan Bypass Nusa Dua as it approaches the enclave.
The international airport is about 20 to 30 minutes by car and a pre-paid taxi fare from there will cost between Rp 95,000 and 110,000. If you are staying here, then your hotel will no doubt arrange to pick you up at the airport.
Public transport if far from regular in the area, but some bemos from Tegal terminal in Denpasar do ply the main bypass.