The Rauðhólar in Elliðaárhraun are lava fields on the south eastern outskirts of Reykjavík. The name 'Rauðhólar' means Red Mounds. It might not come as a surprise that it refers to the colour of the rocks - which are red because of iron oxidations. It´s a pretty impressive terrain! The craters here are about 5200 years old. There used to be many more but they were destroyed for the construction of the airport and roads. It is now a protected area so please visit respectfully.
My kids love walking here. It's a good spot for taking pictures. It is also easy to pretend you are on the moon or that trolls live just round the corner as it has a definite 'other worldly' feel. You can often see horses tours trotting by too.