Given the tropical climate and the various environments have dress codes due to religious beliefs is a wise step. Alternatively, ferries are a popular and often adventurous way to hop between islands, especially smaller ones. Indonesia has stringent drug laws, and some regions you might encounter, being prepared for health-related issues not serviced by airports. While Bahasa Indonesia is the national language, many Indonesians in tourist areas are proficient in English, making communication relatively easy for English-speaking travelers.
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