Villa De Vecchi 1
Nestled in the mountains east of Lake Como, one can find this splendid and haunting baroque villa. Built in the mid 1800s, it has sat abandoned and rotting for years. I don't know the full history, but there are stories associated with it having to do with murder and suicide (apparently true). There are many gorgeous and fascinating details remaining, both inside and out. I have enjoyed many, many, things in my trips to Italy, but seeing this ranks among the top few. It may have had something to do with the fact that I had it all to myself. Absolutely spectacular!
Currently there is some sort of petition drive intended to save the place, and it has gotten some press attention in Italy. But I fear these efforts are doomed.