To me, nothing says “grid” like a prison and its bars. And nothing says prison like the abandoned Patarei Prison in Tallinn, Estonia. Some years ago the Estonian government decided to close this prison by simply walking away and leaving everything behind. Today, most of the prison remains untouched (except for a bit of graffiti), and for a tiny entrance fee you can explore the entire inside and outside of the facility, including all of the old furniture, decorations, medical equipment, technology… and shoes. If you’ve ever been tempted to break the law, a visit to Patarei Prison might make you reconsider!