Angkor Wat, Siem Reap, Cambodia

Towers of the legendary Angkor Wat temple are seen north of Siem Reap provincial town, about 230 kilometers, 143 miles, northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation.(AP Photo/Heng Sinith)

A Cambodian mahout and two Asian tourists ride an elephant as they tour Angkor archaeological park north of Siem Reap provincial town, about 230 kilometers (143 miles) northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation.(AP Photo/Heng Sinith)

An unidentified foreign tourist passes a name card to a Cambodian Buddhist monk at the top of the 10-century Bakheng monument at Angkor archaeological park in Siem Reap province, about 230 kilometers, 143 miles, northwest of the capital Phnom Penh, Cambodia, on June 4, 2006. The temple is a popular place for both Cambodian and foreign tourists, who climb it everyday to view the sunset.(AP Photo/Heng Sinith)

This is an overview of the center of Siem Reap provincial town, about 230 kilometers, 143 miles, northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation. Most of the buildings in the picture are hotels.(AP Photo/Heng Sinith)

Foreign tourists tour the legendary Angkor Wat temple north of Siem Reap provincial town, about 230 kilometers (143 miles) northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation.(AP Photo/Heng Sinith)

Foreign tourists tour a site inside Angkor archaeological park north of Siem Reap provincial town, about 230 kilometers, 143 miles, northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation.(AP Photo/Heng Sinith)

Rays of morning sunrise beam behind the towers of the legendary Angkor Wat temple north of Siem Reap provincial town, about 230 kilometers, 143 miles, northwest of the capital Phnom Penh, Cambodia. Siem Reap is Cambodia's main tourist destination where the famed Angkor temples are located and attracting millions of dollars in revenue every year for the poor Southeast Asian nation.(AP Photo/Heng Sinith)

Tourists gather atop one of the many shrines at Angkor Wat temple complex in Siem Reap, Cambodia. Destinations once deemed to dangerous or remote for travelers such as Angkor Wat are now being overrun with tourist seeking that one last great destination.(AP Photo/Heng Sinith, File)

Tourists gather at Angkor Wat temple complex in Siem Reap, Cambodia. Destinations once deemed to dangerous or remote for travelers such as Angkor Wat are now being overrun with tourists seeking that one last great destination.(AP Photo/Heng Sinith, File)

Tourist ride elephants at one of the main shrines at Angkor Wat in Siem Reap, Cambodia. Destinations once deemed to dangerous or remote for travelers such as Angkor Wat are now being overrun with tourist seeking that one last great destination.(AP Photo/Heng Sinith, File)