Asia
We crossed the Bosphorus by the new bridge.
Both being into our civil engineering gave us an extra appreciation of this impressive, two year old bridge.
The Bosphorus Bridge remained the longest suspension bridge in Europe until the completion of the Humber Bridge in 1981.
This was a significant milestone but I don't recall any celebrations.
We were still in Turkey of course, but on a different continent.
Below is a map showing our approximate route form the Bosphorus in Turkey to the Afghanistan / Pakistan boarder just before the Khyber Pass in Pakistan.
View Trans Asia 1975 - Turkey to Afghanistan in a larger map
An important event, passed without note at the time.