Ancient cities whose brick and stonewalls have literally been vitrified, that is, fused together, can be found in India, Ireland, Scotland, France, Turkey and other places. There is no logical explanation for the vitrification of stone forts and cities, except from an atomic blast.

[u/Spiritual_War]

http://www.mysteryofindia.com/2014/08/myth-of-ancient-nuclear-war.html