From wiki: The outstanding feature of Wat Arun is its central prang (Khmer-style tower). It may be named "Temple of the Dawn" because the first light of morning reflects off the surface of the temple with a pearly iridescence. Steep steps lead to the two terraces. The height is reported by different sources as between 66,80 m and 86 m. The corners are surrounded by 4 smaller satellite prangs. The prangs are decorated by seashells and bits of porcelain which had previously been used as ballast by boats coming to Bangkok from China.