What structures in south east Asia bear witness to the spread of Buddhism?

In Southeast Asia, several structures bear witness to the spread of Buddhism, including the magnificent temples of Angkor Wat in Cambodia, which originally served as a Hindu temple before becoming a Buddhist site. Other notable examples include the ancient Borobudur temple in Indonesia, renowned for its intricate reliefs and stupas, and the Shwedagon Pagoda in Myanmar, an iconic symbol of Buddhist devotion. These structures reflect the region's rich cultural heritage and the enduring influence of Buddhism on local architecture and spiritual practices.