The city of Kiruna was founded around 1900 for iron ore mining. But if the ground is undermined more, the city center will fall down into the pit. Therefore the city is moving now.  Picture above from september 2015. An introduction (in german): Kieler Nachrichten 16. Mai 2015

There is more information about Kiruna on my website (in german), with many pictures from the years 2014-2019.

You may also like to visit the swedish  photographer Kjell Törmäs website (in swedish):

Official informations are found on the homepage of the municipality of Kiruna: (translation program)