Architecture in Bali is unique because it was influenced by old Balinese culture and Hinduism. The most important thing to look for are these crown-like roof pinnacles, found everywhere in Bali. Guardian statues and slit-drum towers are common too. Andesite, a dark, volcanic rock, is a common building material in Bali. You can often see gates, walls, and other intricately carved ornaments built from this material.