Wat Phu
Wat Phu is considered one of the oldest archaeological sites in Laos. One temple in the site was constructed around the 5th century but most buildings found in the complex are from the 11th to 13th centuries.
Like other notable Khmer architecture in Southeast Asia, it was constructed using sandstone, laterite and bricks. Among many of the outstanding carvings there are the Indra, the Hindu god of war, storms, and rainfall, riding a three-headed elephant and Vishnu riding on a garuda, an eagle.
Wat Phu has been an active temple for Buddhist religious practice for quite some time because Buddhism replaced Hinduism in Laos in the mid 13th century. There is an altar at the front section of its sanctuary featuring four big Buddha images with more Buddha images around the ruins.