Maelifell volcano in Iceland is a stunning green cone-shaped mountain located in the remote highlands. Covered in vibrant moss, it rises above black sands and is surrounded by glacial rivers, creating a striking contrast of colors.
Note that the best car for this region is a large SUV like Toyota Landcruiser, Jeep Wrangler and similar
Alternatively you can get here via organised super jeep tour.
You can also hike up, but the terrain is very slippery.