Though it has steadily been gaining a reputation as a lost paradise thanks to overdevelopment, the northern coast of Bali remains relatively untouched. This side of the island, split from the south by a volcanic mountain range, is also an ideal place for an active holiday in Indonesia, particularly if you are looking for a Bali diving holiday. An ideal time to visit is September, as the summer holiday visitors head home, the rainy season is yet to begin and temperatures start to cool.