Within the grounds of the palace, there's a miniature Angkor Wat. It is so beautiful.
Angkor Wat is a temple complex in Cambodia. It is very famous and beautiful.
It was built for the king Suryavarman II in the early 12th century as his state temple and capital city. As the best-preserved temple at the site, it is the only one to have remained a significant religious centre since its foundation—first Hindu, dedicated to the god Vishnu, then Buddhist.
You can read more from wikipedia