Bali is beautiful

Most of the coastline of Bali is fringed by beaches of some type, with the exceptions being some important areas of mangrove forest in the southeast, and certain parts of the Bukit Peninsula where high cliffs drop straight to the crashing waves of the Indian Ocean.

Unsurprisingly, given the volcanic nature of the island, black sand is the norm, but there are also some beaches in the south which have fine-grained white sand. Beaches that are especially safe for swimming include Jimbaran Bay and virtually all of the north coast. At all times though, visitors should be aware of and obey local swimming safety markers—far too many visitors to Bali drown each year after ignoring these. Bali's popular southern beaches are sometimes not the cleanest you will find. This is particularly true during the height of the wet season (December to January), when the heavy rains cause extensive agricultural run-off and garbage to be washed onto the beaches.
Away from the coast, Bali is largely lush, green and fertile, and rice paddies are the dominant agricultural feature of the island. In some areas, paddies take the form of dramatic sculpted terraces which efficiently utilise every available acre of land for cultivation. Especially beautiful examples of terraced paddies can be found in the centre of the island north of Ubud and in east Bali around Tirta Gangga . Elsewhere, gently rolling rice fields make for very pleasing rural scenery.

All of Bali's mountains are volcanoes, some long dormant and some still active. At 3,142 metres, magnificent Mount Agung dominates the landscape of East Bali and has not erupted since 1963. Much more active is Mount Batur, which permanently smoulders and periodically produces a large bang and plumes of ashy smoke as pressure is released from within. Taking only 2 hr to climb, Batur is one of the most accessible active volcanoes in the whole of Indonesia.

source: wikitravel