Here's a reference for the same in Europe: https://www.forgottenairfields.com/
Talking about Romania and airfields, I think that information (the location of the airfields) was some State secret for a long time. There are some military topographical maps (mostly from the 1970s) where not one airfield or airport is shown [1]. Otherwise those maps are full of other very interesting details (like the location of mineral resources). For example if one zooms in to the Northern area of Bucharest where its two airports are located there's nothing on those maps.
[1] https://portal.geomil.ro/portal/home/webmap/viewer.html?webm...
https://duckduckgo.com/?t=ffsb&q=llandow+&ia=images&iax=imag...
I think this has been positive as a way of unlocking land for things that need space. So much of England is "precious" both in terms of value and how it is protected. Having a place to build and rebuild grotty factory units is very helpful.
I live near a site that started as an arm's depot. About twenty years ago it started to be leased as small units to startups. Many biotech spin-off companies that needed adaptable space moved in. Now it is full of large biotech labs and distribution centers. Soon there will be large data centres. There are a couple of nuclear research sites on old airfields close by which also host a space cluster.
For example, Greenham Common is not listed[1], and I guess it's up to the users to submit it!
"In 2017 a flight over the former airbase showed it had suffered the same faith as many other European air bases: it had become a solar powerplant"
made me laugh.