Arcos de la Frontera, Spain
Arcos de la Frontera is located on a cliff top in southern Spain. It's the gateway to the Route of the White Villages. For centuries, Arcos was the border where the Islamic Moors and Christians battled for control of the town. The Moors took control in the 8th century and built fortresses and narrow winding streets in the town. Temperatures in Arcos reach as high as 42 degrees Celsius during its 300 days of summer. The city's white walls deflect the sunlight keeping the inside rooms comfortable.