Plan your visit Around us Rocks, fossils and geology The rocks of the Black Country have made the region what it is today. Hundreds of millions of years of changing environments in the area laid down rocks such as limestone, coal, iron ore and clay that would go on to be used as the raw materials of the industrial revolution. You can see the influence of our unique and fascinating geology everywhere, but we're also lucky to have many internationally important geological sites in our local area that you can explore. Go fossil hunting at the Wren's Nest Nature Reserve, talk a walk at Saltwells Nature Reserve or discover an ancient extinct volcano at Barrow Hill - you'll be spoiled for choice! If you're interested in what's beneath your feet, check out our region's bid to become a UNESCO Global Geopark! The project's website is packed full of sites to visit, information and more.