Abandoned Space shuttle hangar, in Kazakhstan

The Buran

An article from 2015 with a couple more pictures:

https://barnfinds.com/biggest-barn-find-ever-russian-space-shuttles/

Two more articles with some higher resolution photos and videos:

https://www.outono.net/elentir/2018/04/03/they-sneak-into-a-russian-base-and-there-record-two-abandoned-space-shuttles/

https://www.outono.net/elentir/2024/01/20/the-infiltration-of-spanish-urban-explorers-into-the-russian-baikonur-cosmodrome/

Found the original LiveJournal blog (in Russian) with all the pictures, including interiors of the shuttles:

https://ralphmirebs.livejournal.com/219949.html

And it has a decaying shuttle!