Wikipedia article of the day is Angkor Wat. Check it out:
Article-Link Summary: Angkor Wat is a temple at Angkor, Cambodia, built in the capital city for King Suryavarman II in the early 12th century as the state temple. The largest and best-preserved temple at the site, it is the only one to have remained a significant religious center—first Hindu, then Buddhist—since its foundation. The temple is the epitome of the high classical style of Khmer architecture. It has become a symbol of Cambodia, appearing on its national flag, and is the country’s prime attraction for visitors. Angkor Wat combines two basic plans of Khmer temple architecture: the temple mountain and the later galleried temple. It is designed to represent Mount Meru, home of the gods in Hindu mythology. At the center of the temple stands a quincunx of towers. The temple is admired for the grandeur and harmony of its architecture and for the extensive bas-reliefs and the numerous devatas adorning its walls. Unusually, Angkor Wat faces the west; scholars are divided as to the significance of this.