What is the setting of Time's Eye by Arthur C. Clarke?

Time's Eye has many settings and is told from the perspective of several time periods. The story combines a helicopter crew and a space shuttle crew from the year 2037 with a British troop from the year 1885, and each group finds themselves thrust even further back in time to the thirteenth century where a battle between Alexander the Great and Genghis Khan ensues. We are taken from Earth's orbit in 2037 to Jamrud—a fort in the North-West Frontier where India meets Asia in 1885, and then to Babylon in the 13th century where the great battle between Ghenghis Khan and Alexander the Great is fought. From there, an exploration that begins in Alexandria will take some of the characters up the coast of Judea to Jerusalem and on to explore the new world created by the Discontinuity.