Rock drawings of Thamudic origin, relating to ancient tribe of Thamud, 3rd century BC to 2nd century AD, in canyon of Jebel Khazali, south of Rum village, Wadi Rum, Jordan

Dusk lights on Puerta del Puente and Calahorra tower (Torre de la Calahorra), gate of Islamic origin, Cordoba, UNESCO World Heritage Site, Andalusia, Spain, Europe

Avenue of Sphinxes, Luxor, Thebes, UNESCO World Heritage Site, Egypt, North Africa, Africa

View of clock tower of Greek Orthodox Church, Theologos, Thassos, Aegean Sea, Greek Islands, Greece, Europe

View of a lighted boat and fish in a canal in San Marco at night, Venice, Veneto, Italy, Europe

Detail shot of a carved face on a house facade in San Marco, Venice, Veneto, Italy, Europe

Badly damaged prehistoric pictographs of Fremont origin in Temple Wash, central Utah

Historic petroglyphs (probably Navajo in origin) at Sand Island, near Bluff, Utah.

A young woman looks into the distance over some ancient Incan ruins along the Inca Trail.

Historic petroglyph (probably Navajo in origin) at Sand Island, near Bluff, Utah.

Ancient stone circle