The Dimmuborgir (dark castles) area near Lake Mývatn in northern Iceland is a fascinating place of lava formations and pillars created about 2,000 years ago.
This formation is called Kirkjan (the church) for obvious reasons:
Be careful if you visit though, as this area is said to connect earth with the infernal regions. You should also look out for elves and trolls. As usual, Iceland’s natural landscape is so dramatic and unexpected that you could imagine all kinds of things happening here. (or am I reading too many Icelandic crime books?)