Immediately after switching the page, it will work with CSR.
Please reload your browser to see how it works.
https://en.wikipedia.org/wiki/Hallgr%C3%ADmskirkja
https://www.re.is/is/blog/guide-to-hallgrimskirkja-church-re...
https://yourfriendinreykjavik.com/hallgrimskirkja-a-tribute-...
They are called "defense bunkers against devil"
Some pictures:
https://twitter.com/sorjonen_fi/status/916606080154767361
https://twitter.com/ArtoNatkynmaki/status/168386825764259020...
https://fi.wiktionary.org/wiki/piruntorjuntabunkkeri#/media/...