Chiaturas’ extreme geography made the use of a cable car system widespread. Since the 50’s this soviet era system hasn’t had much work done on it.
In central Turkey, an ancient people dug, over 200 underground cities. The deepest of these, under the present day town of Derinkuyu, goes over 250 feet below the Earth’s surface.
The Brutalist masterpiece that is Preston Bus Station has gotten a reprieve from being knocked down.
Another post looking at mapping the age of buildings in different cities, a good overview here.