Inca road system: Did you mean...?

The entrance to the water system at Tel Gezer in central Israel. This photo was taken during the 2011 excavations of the water system by the New Orleans Baptist Theological Seminary. The water system is believed to have been built during...

The Wanka (also Wanca or Huanca) people occupied the highlands of ancient central Peru around Lake Junin and the Manataro, Chanchamayo and Tarma rivers. The culture flourished from the Middle to Late Horizon periods (600 CE - 1532 CE). Dwelling...

Earth's solar system by NASA and Rawpixel.

A photograph of part of the tunnel network of the Maginot Line, the defensive system built along France's eastern frontiers prior to the Second World War (1939-45). From the Schoenenbourg fort, Bas-Rhin, France.

An illustration of the solar system by Martin Kornmesser. From The International Astronomical Union.

The underground channel of a qanat in the Turfan water system in the Turpan Depression of Xinjiang, China.

The Silk Road and Ancient Trade: In which John Green teaches you about the so-called Silk Road, a network of trade routes where goods such as ivory, silver, iron, wine, and yes, silk were exchanged across the ancient world, from China to...

Typical imperial Inca trapezoid windows from the sacred precinct of Coricancha, Cuzco, c. 1438 CE.

Display of pots at Tucume Museum, Peru. The pots were found during an excavation of the pre-Inca civilisations in Northern Peru. Dates unknown. Photo taken by Hilary Bradt and used with permission.

Map of the Persian Royal Road from Susa to Sardes.