Angkor Wat Reflected at Sunrise, Siem Reap, 12th Century — Golden light breaks over the temple spires as the still waters of Angkor Wat's moat create a flawless mirror image. The 190-meter-wide moat was both a cosmological symbol of the primordial ocean and a feat of Khmer hydraulic engineering.
© Chi King, CC BY 2.0, via Wikimedia Commons