A prophecy in Islam that “cities shall draw nearer to each other”

He[‘Abdu’l-Bahá] added:

It is written in the Hadith [Islamic traditions] that cities shall draw nearer to each other. Besides spiritual nearness and communications between the cities of the hearts and friendships between diverse people in the promised Day, how physically close have the cities and countries also become. Truly, if not for railroads and the power of steam, how could these long distances be traversed with such ease? This is one of the miracles of this promised century of our current age.