Angkor Wat is a temple complex in Cambodia and the largest religious monument in the world. It was originally constructed as a Hindu temple, gradually transforming into a Buddhist temple toward the end of the 12th century. It is the one of the buildings I have impressed most because it is a huge temple which stands for centuries. It is also a symbol of Cambodia which appears on the national flag. It is an architectural wonder worth visiting. In a word, it is breathtaking.