I've heard the Snæfellsnes Peninsula described as "magical". To each their own adjective, but magical or no, it's a pretty interesting place with all kinds of rock formations, waterfalls and other natural goodies to keep the wide-eyed tourist (like me) quite happy. And it's not that far from Reykjavik, only about an hour and forty-five minutes, with plenty of bus tours if you're not inclined to drive yourself.
We spent the day on Snæfellsnes, and our first stop on the grey, gloomy morning was Gerðuberg Cliffs. The cliffs run about 1/3 of a mile in length and are made of up hundreds of basalt columns , and are easily spotted from the road. I've never been to The Giant's Causeway in Ireland, but from the pictures I've seen, the formations are very similar to what are on the cliffs. It's a bumpy ride to the dirty parking lot at the base of the cliffs, but our little Citroen handled it just fine. And keep your wallet away - there is no fee to visit the cliffs.
Getting to the top of the cliffs isn't too difficult, but the footing can be a tricky. We visited on an overcast day where sunshine was a rarity, but the grass was dry. At the top, there are a few paths through the rocky grasslands as you meander along the plateau, but it has that desolate greyness, complete with mist covering the mountaintops.
The columns, which can be over forty feet tall, are mostly clustered together, doing their little basalt column thing, but there are some outlier anti-social columns. If you notice, there are several rocks stacked atop the Leaning Tower of Iceland. I wonder if someone stacked those rocks or they were there when the column started pulling away? I hope the latter, though there are those crazy people that would do that sort of thing.