I love to explore abandoned areas and I can understand when someting you find it’s no longer there! It happened to me too, but just because in the place of the abandoned building there was a ne)w building ;) Here in my city we had an interesting abandoned area (close to the train station)that was a part of the station. Around the 1970 some workers (who were protesting in front of some terms of employment) painted there some beautiful murales! For many years that painted wall was there to remember us that times, but about 10 years ago the wall was destroyed to make place for a new building.