While I was on my Lake Mývatn day trip near Akureyri, we visited Dimmuborgir (Dark Cities / Dark Forts), also called the Gates of Hell. It’s a lava field that’s formed all sorts of cool rock formations, caves and cliffs and rocky protrusions that can be interpreted, like clouds, into silhouettes of various creatures and scenes. Our guide, Trystí, pointed out formations he thought looked like a troll, a squirrel, and gorillas, to name a few.
It was really cool! And apparently local farmers dress up like Santa Clauses for christmas, and run around, darting between the pillars, for children to catch glimpses of them. : D