Colorful fall flora at Dimmuborgir, the "Dark Castles" near Lake Mývatn in northeast Iceland
Dimmuborgir is a large area of unusually shaped lava fields east of Mývatn. The area is composed of various volcanic caves and rock formations. It is one of the most popular natural tourist attractions in northern Iceland. According to folklore, Dimmuborgir is also the home of a famous troll named Grýla and her third husband Leppalúði. Game of Throne reference: This is where the wildlings set up the camp in season 3 north of the wall. It can also be seen when Ygritte steals Jon's sword and gets him into the cave.
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