Spain, Extremadura, Merida, Roman Theatre ruin.

Spain, Extremadura, Merida, Roman Theatre ruin.

Spain, Extremadura, Merida, Roman Theatre ruin.

Spain, Extremadura, Merida, Roman Theatre ruin.

Spain, Extremadura, Merida, Ruins of the Roman Temple of Diana from the first century BC.

Ireland, County Cork, Kinsale, Charles Fort Museum building seen through the door way of a ruined building built in 1678.

Mexico, Anahuac, Teotihuacan, Detail of pyramid in foreground of Pyramid del Sol.

Mexico, Anahuac, Teotihuacan, Tourists climbing the steps of the Pyramid del Sol.

Mexico, Anahuac, Teotihuacan, Tourist couple taking in the view towards Pyramid del Sol.

Mexico, Anahuac, Teotihuacan, Smaller pyramids in the foreground of Pyramid del Sol.

Mexico, Anahuac, Teotihuacan, Pyramid de la Luna.

Mexico, Anahuac, Teotihuacan, Pyramid de la Luna and Plaza de la Luna with tourist visitors.