Turkey, Istanbul, Sultanahmet, Yerebatan Sarnici, Basilica Cistern,

Mexico, Anahuac, Teotihuacan, View along Calzada de los Muertos towards the Pyramid de la Luna with tourist visitors.

Mexico, Federal District, Mexico City, Part view of steps of main pyramid in Templo Mayor Aztec temple ruins.

Mexico, Puebla, Narrow, exploratory tunnels within the pyramid of Cholula.

Mexico, Oaxaca, Monte Alban, Sistema IV building.

Mexico, Oaxaca, Mitla archaeological site, Detail of geometric stone mosaic on the Templo de las Columnas.

Mexico, Oaxaca, Mitla archaeological site, Templo de las Columnas.

Italy, Lazio, Rome, View of the the ancient Roman Coliseum ruins.

Italy, Lazio, Rome, The Arch of Constantine with the Coliseum behind.

Spain, Extremadura, Merida, Roman Theatre ruin.

Ireland, County Kerry, Dingle Peninsula, Beehive hut in the Fahan Group.