kirkjugolf natural monument (the church floor), hexagonal basalt columns rock formation, iceland

architecture basalt basaltic block boulder church closeup column erosion europe field floor formation frozen geology geometric ground hexagonal iceland icelandic kirkjubaejarklaustur kirkjubabrvbar jarklaustur kirkjugolf kirkjugasup3 lfiadeg landmark lava magma material monument moss natural nature people outdoor pattern pillar rock shape slab south stack stone surface tiled top tourism town travel view volcanic