Rauðhólar

The Rauðhólar ("red hills") are remnants of a cluster of pseudocraters in Elliðaárhraun lava fields on the south-eastern outskirts of Reykjavík. The Rauðhólar pseudocraters are part of Reykjavík's nature reserve of Heiðmörk.

The age of the Rauðhólar is about 5200 years.

Originally there were over 80 craters, but the gravel from them was taken and used for construction. Most of the material was taken around World War II and used for projects such as Reykjaví Airport and road building. Rauðhólar was first protected from such activity as late as 1961 and was provided further security from interference in 1974. 

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