A tiny tidal island where the city quietly runs out and the North Atlantic begins
1897
First lighthouse here
23m
Tall
106
Bird species recorded
Tide
Only reachable at low tide
The Story
Grótta sits at the far northwestern tip of the Seltjarnarnes peninsula, connected to the mainland by a strip of sand that the sea swallows twice a day. There's been a lighthouse here since 1897, though what you'll actually see is the 1947 rebuild, wired for electricity in 1956 and left more or less untouched since. Records show a farm stood on this exact spot back in the 16th century — the name "Grótta" likely comes from an old word for a grinding mill, a small, practical origin for a place that now feels almost otherworldly.
By the 19th century the area had drifted into obscurity, a forgotten edge of a small fishing town. It's only in the last few decades that Grótta became what it is now — one of the most-visited natural spots in greater Reykjavík, for locals and travelers alike. It's been a protected nature reserve since 1974, specifically for its birdlife, and the island itself is uninhabited except for the fully automated light.
The tide is not a detail here — it's the whole point.
As You Walk Around
Easy to miss if you're not looking
Watch the causeway, not just the lighthouse. The sand spit connecting the mainland to the island is only exposed part of the day — it's genuinely part of the experience, not an inconvenience. Visitors have been caught out and stranded before by lingering too long as the tide turns.
Look for the old fish-drying racks along the path. The wooden frames (called hjallar or trönur in Icelandic) were used to air-dry fish the traditional way — a quiet, easy-to-walk-past reminder that this was a working coastline long before it was a scenic one.
There's a small geothermal foot bath on site. Easy to miss, genuinely nice to use — soak your feet while looking out at the lighthouse and the bay.
If terns are nesting nearby, give them room. Arctic terns can be fiercely territorial and will dive-bomb anyone who gets too close to eggs or chicks. Not a concern in October, but the birds themselves are still worth watching from a distance.
Fun Trivia
Things most visitors don't know
Local legend says it's haunted. The story goes that the spirit of a shipwrecked sailor still lingers around the lighthouse — take it as Icelandic coastal folklore rather than fact, but it's the kind of detail that sticks with you standing out there at dusk.
It's genuinely one of Reykjavík's best aurora spots — precisely because it's dark, open, and west-facing, with nothing but ocean between you and the horizon.
The name may come from a grain mill, not the sea. Despite feeling like the edge of the world, "Grótta" likely traces back to a farm and a grinding mill that once stood right here, centuries before anyone thought to put a light on the rock.