The Temple of the Sacred Tooth Relic is Sri Lanka’s most venerated Buddhist site. The evening puja ceremony, when the inner shrine opens and the temple drums begin, is one of those experiences that stays. Peradeniya Botanical Gardens rounds out the day – 147 acres with one of Asia’s finest orchid collections, a giant Java fig canopy that has to be seen to be believed, and the particular pleasure of a tropical garden that has been curated for almost two centuries.