The country known for the ancient site of Angkor Wat is Cambodia. This UNESCO World Heritage Site, originally constructed in the early 12th century, is a stunning example of classical Khmer architecture. Angkor Wat was initially built as a Hindu temple dedicated to the god Vishnu but later transformed into a Buddhist temple. Its intricate carvings and massive scale demonstrate the engineering prowess of the Khmer Empire. Today, it is a major tourist destination, reflecting Cambodia's rich cultural heritage.