The Black Sand Beach at Vik in southern Iceland quite a sight. When we visited in November and stood on the beach as the waves rolled in onto the black sand I looked up and it started to snow. It was quite a special moment.
The stacks you can see rising out of the sea are basalt stacks called Reynisdrangar. The beach itself is beautiful but take caution, it can get very stormy and you can find the beach can disappear with just one big wave (as we did when a group of us had to run into a tiny cave to escape one wave ourselves). Since visiting I've read more about the beach and people have died on it being caught out by the tide.
The waves I saw that day were the biggest I have ever seen, just magnificent and awe-inspiring in their sheer power.