A notable achievement is the site of Angkor, which is located in present-day Cambodia, the Khmer capital when the empire was the greatest. The majestic monuments of Angkor, such as Angkor Wat and Bayon, show the Khmer Empire's immense power, wealth, art, culture, architectural technique, aesthetics achievements, and the variety of belief systems that the Khmer Empire had over time. Satellite imaging has revealed that Angkor was the largest pre-industrial urban center in the world during the Khmer Empire's peak in the 11th to 13th centuries.