Northeast Iceland is large - about one-fifth of Iceland's total land area. Some interesting locations and activities can be found here. And please check out a good map of Iceland.
Note on the map below that the towns and villages are all located near the coastline with the exception of the village of Reykjahlíð (Reykjahlid), situated next to a lake called Mývatn, which is a bird haven with migrating flocks from many world regions.
Land animals do not survive in the volcanic winter-cold highlands and Iceland is free from dangerous wildlife (if we take the liberty of excluding the occasional polar bear that accidentally drifts here and needs to be taken care of). Agriculture is practised on the grassy lowland and valleys, making up a small portion of the otherwise highland area. The sheep roam free in the highlands in summer while the cows and pigs are kept indoors. Reindeer graze further east while horses are kept all over the country, mostly for riding in the open nature and sometimes enjoying the exceptional five gaits of the Icelandic horse.
No large forests exist in Iceland – the largest in the Northeast area is Vaglaskógur, some 3 km2. Instead, the area has many volcanoes, situated near the separating tectonic plates, that gently glide apart and open up magma passages associated with mild earthquakes (rare ones are however close to magnitude 7).
The ocean is full of life, currently harnessed by the fishing industry and fish farming can be practised in Eyjafjörður (Eyjafjordur) and Öxarfjörður (Oxarfjordur).
Some of the geothermal fields resulting from the tectonic activity are harnessed both for direct use and electric power generation, providing renewable energy at very reasonable prices, sometimes competing favourably with the even more economic hydropower.
The terrain is sometimes difficult, so bring the Icelandic horse and some food to enjoy the 24-hour daylight near any of the geothermal pools, providing warmth and healthy skin.