The golden-roofed Temple of the Sacred Tooth houses Sri Lanka’s most important Buddhist relic – a tooth of the Buddha. During puja (offerings or prayers), the heavily guarded room housing the tooth is open to devotees and tourists. However, you don’t actually see the tooth. It’s kept in a gold casket shaped like a dagoba (stupa), which contains a series of six dagoba caskets of diminishing size. As well as the revered main temple, the complex includes a series of smaller temples, shrines and museums.