The so-called Church Floor is situated in the meadow just northeast of the hamlet Kirkjubaejarklaustur in the South. The path from the parking area lies past a stone hummock called Hildishaugur, which is better explained under the title Kirkjubaejarklaustur.
The Church Floor is a pure natural phenomenon, the tops of basaltic columns on the surface, covering an area of about 80 m², just like tiles on the ground. Basaltic columns are created when the flowing lava comes to a halt and cools off, probably in boggy areas, where steam percolates through as well. The Church Floor was declared inviolate.