Phra Pathom Chedi is a prominent Buddhist stupa located in Nakhon Pathom, Thailand. It is recognized as the world's tallest stupa, standing at 127 meters (417 feet). Built in the 19th century, it is a significant religious site for Buddhists and attracts many visitors each year. The stupa is a symbol of the introduction of Buddhism to Thailand and is believed to house relics of the Buddha. Its design features a large, circular base topped with a bell-shaped dome and a pointed spire, showcasing traditional Thai architecture and serving as a focal point for local worship and ceremonies.