Here are some abandoned places that we discovered in Ukraine

Volotsisk Military Museum

Map (49.545219, 26.197689)
If you like military things you will like this museum. There are over a dozen example of different military weapons and machines here along with a large, still intact, bunker that was built as part of the Stalin Line. Unfortunately the day we were there the bunker was not open for us to go through it but the machines are in the open and interesting and decently taken care of.