Dimmuborgir

Dimmuborgir (from the Icelandic "dimmu" meaning "dark" and "borgir" meaning "cities" or "fortresses") is often called the "Dark Castles." It is a vast area of strange lava formations located to the east of Lake Mývatn, formed by a volcanic eruption around 2,300 years ago. The area is filled with lava pillars, caves, rugged cliffs, and towering rocks, some reaching as high as 20 meters, creating an almost otherworldly landscape resembling an alien fortress. It attracts a large number of visitors each year and was designated a nature reserve in 2011.

According to Icelandic folklore, Dimmuborgir is said to be the connection between Earth and the underworld. In Nordic Christian legends, it is also believed to be the place where Satan landed after being cast out of heaven, where he then created the underground chambers of hell.

There are three marked walking routes through this area of spectacular lava formations, allowing visitors to explore the labyrinth of eerie lava layers. These formations surprisingly shelter a rich array of vegetation during the summer. At all junctions, maps indicate your location. Most of the routes are easy to walk, with the shorter loop taking about 30 minutes and the longer loop, which leads to the famous "Kirkjan" (Church) cave, taking about two hours.

Many locals believe Santa Claus lives in Dimmuborgir, and you might have the chance to meet him if you visit in December. Dimmuborgir also served as a filming location for the popular TV series *Game of Thrones*, and a Norwegian black metal band named themselves after it.