KERKRADE, NETHERLANDS - OCTOBER 8: King Willem-Alexanderand Queen Maxima of The Netherlands walk past the former mining shaft Schacht Nulland during a visit to the former mining region on October 8, 2015 in Kerkrade, Netherlands. The region this year celebrates the 'Year of the Mines', 50 years after the announcement of the closing of the mines. (Photo by Michel Porro/WireImage)
