If you want to visit derelict places Chernobyl & Pripyat as to be one of the all time top locations. I visited in Apr 2015. I was intending to put it off until after buying a new camera. But with the war in eaten Ukraine hotting up, I decided I should go wile I still could.
50,000 people were evacuated, when reactor number four went into melt down then blew up. To speed up the evacuation, the residents were told to bring only what was necessary since the authorities said it would only be a temporary evacuation lasting approximately three days. As a result, most of the residents left most of their personal belongings which can still be found at Pripyat. An exclusion zone of 30 km (19 mi) remains in place today.

We met this couple who refused to leave, they still live within the exclusion zone.

The crew, from right to left. Myself, James Kerwin, Ritchie Gowin, Gigi Soden,
Rebecca Bathory, Jess Norgrove, Adam x should have been in this as well, but he was lagging behind as normal.