Literally thousands and thousands.
Go to a rich neighbourhood, look at a castle, look at a cathedral, temple or a grand mosque.
Rich people have been constructing impressive buildings for millennia, competing to show off their status. Impressive buildings tend to be larger and taller than unimpressive buildings.
Unlike you, I don't class being able to observe basic things about the world you live in as being miraculous.
With both of these hadith you are reading things which aren't there. A man trying to outdo his neighbours by building a taller house fits the hadith, yet you seem to think that it has to be a competition to construct the tallest building in the world in order to qualify.
(Hiroshima and Nagasaki weren't destroyed btw, only buildings within the blast radius of a mile or so.)
The hadith is "Great cities will be ruined and it will be as if they had not existed the day before." It specifies no particular method of destruction, nor does it rule any out.
Things that were common in the 7th C ME:
a) awareness of stories about cities being destroyed
b) beliefs that there would be violence and destruction at the 'end of days'
You seem to think that saying something that chimes with common knowledge is 'miraculous', most people set the 'miracle' bar a tiny bit higher than that though.
Anyway, if the 'prophecy' had been intended to be about modern warfare, then I doubt other signs of the hour would heavily involve the Byzantine Empire and medieval battles.
Yusayr bin Jabir said, "A red sandstorm erupted in the city of Kufah. Afterwards, a man came shouting and repeating the same words, 'O Abdullah bin Mas'ud! The hour has come.' He (Yusayr) then said that he sat up after he was leaning (on his side) and said, ''The hour will not arrive until no inheritance will be divided and no war possessions will bring about satisfaction. ''He pointed with his hands towards Ash-Sham saying, ''An enemy will gather its forces against the followers of Islam.''I said, ''Do you mean Ar-Rum? He said ''Yes.''Then, during this war, fierce fighting will occur. Muslim will ask for a volunteer expedition that will vie to die or return victorious. They will fight until the night separates them. Both sides will return to their camps not yet victorious and the expedition will perish.
Seeing as it is Olympics time at the moment, I'm going to award you the gold medal for mental gymnastics. Very impressive, well done.