Cambodia's temple heartland

Tourists gather every day before dawn to watch the sun rise over Angkor Wat, a 12th-century temple and the grandest legacy of Cambodia's once mighty Khmer empire. Even at 5 a.m., the heat and humidity is enough to make the visitors break into a sweat.

More than 1 million people come annually to see the remains of the Khmer temples that dot the sprawling Angkor region, 145 miles northwest of the country's capital, Phnom Penh.

For Cambodians, the temples are a symbol of their nation; an outline of Angkor Wat adorns the national flag.

A nearby temple, Wat Thmei, also includes a reminder of a dark chapter in recent Cambodian history. A memorial stupa houses bones and skulls from the victims of the "killing fields," who were executed by the brutal Khmer Rouge regime that ruled in the late 1970s.

Today, Angkor is a vital contributor to the poor nation's economy, with almost all visitors to the country traveling to the ruins then resting up in the nearby town of Siem Reap.