Bali is an Indonesian island located at the westernmost of the Lesser Sunda Islands, lying between Java to the west and Lombok to the east. It is one of the Indonesia's 33 provinces with the provincial capital at Denpasar towards the south of the island.

With a population recorded as 3,551,000 in 2009, the island is home to the vast majority of Indonesia's small Hindu minority. 93.18% of Bali's population adheres to Balinese Hinduism, while most of the remainder follow Islam. It is also the largest tourist destination in the country and is renowned for its highly developed arts, including dance, sculpture, painting, leather, metalworking and music.

The island of Bali lies 3.2 km (2 mi) east of Java, and is approximately 8 degrees south of the equator. Bali and Java is separated by Bali Strait. East to west, the island is approximately 153 km (95 mi) wide and spans approximately 112 km (69 mi) north to south; its land area is 5,632 km².

The highest point is Mount Agung at 3,142 m (9,426 feet) high, an active volcano that last erupted in March 1963. Mountains range from centre to the eastern side, with Mount Agung the easternmost peak. Mount Batur (1,717 m) is also still active; an eruption 30,000 years ago was one of the largest known volcanic events on Earth.[citation needed] In the south the land descends to form an alluvial plain, watered by shallow, north-south flowing rivers, drier in the dry season and overflowing during periods of heavy rain. The longest of these rivers, Ayung River, flows approximately 75 km.

The island is surrounded by coral reefs. Beaches in the south tend to have white sand while those in the north and west have black sand. The beach town of Padangbai in the south east has both[citation needed]. Bali has no major waterways, although the Ho River is navigable by small sampan boats. Black sand beaches between Pasut and Klatingdukuh are being developed for tourism, but apart from the seaside temple of Tanah Lot, they are not yet used for significant tourism.

The largest city is the provincial capital, Denpasar, near the southern coast. Its population is around 300,000. Bali's second-largest city is the old colonial capital, Singaraja, which is located on the north coast and is home to around 100,000 people. Other important cities include the beach resort, Kuta, which is practically part of Denpasar's urban area; and Ubud, which is north of Denpasar, and is known as the island's cultural centre.

Three small islands lie to the immediate south east and all are administratively part of the Klungkung regency of Bali: Nusa Penida, Nusa Lembongan and Nusa Ceningan. These islands are separated from Bali by the Badung Strait.

To the east, the Lombok Strait separates Bali from Lombok and marks the biogeographical division between the fauna of the Indomalayan ecozone and the distinctly different fauna of Australasia. The transition is known as the Wallace Line, named after Alfred Russel Wallace, who first proposed a transition zone between these two major biomes. When sea levels dropped during the Pleistocene ice age, Bali was connected to Java and Sumatra and to the mainland of Asia and shared the Asian fauna, but the deep water of the Lombok Strait continued to keep Lombok and the Lesser Sunda archipelago isolated.

Bali is renowned for its diverse and sophisticated art forms, such as painting, sculpture, woodcarving, handcrafts, and performing arts. Balinese percussion orchestra music, known as gamelan, is highly developed and varied. Balinese performing arts often portray stories from Hindu epics such as the Ramayana but with heavy Balinese influence. Famous Balinese dances include pendet, legong, baris, topeng, barong, gong keybar, and kecak (the monkey dance). Bali boasts one of the most diverse and innovative performing arts cultures in the world, with paid performances at thousands of temple festivals, private ceremonies, or public shows.

The Hindu New Year, Nyepi, is celebrated in the spring by a day of silence. On this day everyone stays at home and tourists are encouraged to remain in their hotels. But the day before that large, colourful sculptures of ogoh-ogoh monsters are paraded and finally burned in the evening to drive away evil spirits. Other festivals throughout the year are specified by the Balinese pawukon calendrical system.

Celebrations are held for many occasions such as a tooth-filing (coming-of-age ritual), cremation or odalan (temple festival). One of the most important concepts that Balinese ceremonies have in common is that of désa kala patra, which refers to how ritual performances must be appropriate in both the specific and general social context. Many of the ceremonial art forms such as wayang kulit and topeng are highly improvisatory, providing flexibility for the performer to adapt the performance to the current situation. Many celebrations call for a loud, boisterous atmosphere with lots of activity and the resulting aesthetic, ramé, is distinctively Balinese. Oftentimes two or more gamelan ensembles will be performing well within earshot, and sometimes compete with each other in order to be heard. Likewise, the audience members talk amongst themselves, get up and walk around, or even cheer on the performance, which adds to the many layers of activity and the liveliness typical of ramé.

Kaja and kelod are the Balinese equivalents of North and South, which refer to ones orientation between the island’s largest mountain Gunung Agung (kaja), and the sea (kelod). In addition to spatial orientation, kaja and kelod have the connotation of good and evil; gods and ancestors are believed to live on the mountain whereas demons live in the sea. Buildings such as temples and residential homes are spatially oriented by having the most sacred spaces closest to the mountain and the unclean places nearest to the sea.

Most temples have an inner courtyard and an outer courtyard which are arranged with the inner courtyard furthest kaja. These spaces serve as performance venues since most Balinese rituals are accompanied by any combination of music, dance and drama. The performances that take place in the inner courtyard are classified as wali, the most sacred rituals which are offerings exclusively for the gods, while the outer courtyard is where bebali ceremonies are held, which are intended for gods and people. Lastly, performances meant solely for the entertainment of humans take place outside the walls of the temple and are called bali-balihan. This three-tiered system of classification was standardized in 1971 by a committee of Balinese officials and artists in order to better protect the sanctity of the oldest and most sacred Balinese rituals from being performed for a paying audience.

Tourism, Bali’s chief industry, has provided the island with a foreign audience that is eager to pay for entertainment, thus creating new performance opportunities and more demand for performers. The impact of tourism is controversial since before it became integrated into the economy, the Balinese performing arts did not exist as a capitalist venture, and were not performed for entertainment outside of their respective ritual context. Since the 1930’s sacred rituals such as the barong dance have been performed both in their original contexts, as well as exclusively for paying tourists. This has led to new versions of many of these performances which have developed according to the preferences of foreign audiences; some villages have a barong mask specifically for non-ritual performances as well as an older mask which is only used for sacred performances.

The Balinese eat with their right hand, as the left is impure, a common belief throughout Indonesia. The Balinese do not hand or receive things with their left hand and would not wave at anyone with their left hand.