Schengen Map (passport-free travel), Eurozone Europe map
Schengen Europe Map created by IgnisFatuus, Blue-Haired Lawyer, Danlaycock and Bugbog.
EU member states participating
EU member state not participating in Schengen and not required to join
Brexit (British Exit), but not quite yet!
non-EU member states participating
non-EU member states de facto participating (Monaco)
non-EU member states with an open border (San Marino and Vatican City inside Italy)