Step inside four extraordinary forgotten locations across the UK.

In this 4- part BBC Earth series, we follow wildlife filmmaker Dan O’Neill and zoologist Yussef Rafik as they discover what happens when abandoned places – from a former slate quarry to a disused coal mine – turn wild. These places were once busy sites. But over the years, their doors have closed, and nature has been allowed to run riot. Dan and Yussef are on a mission to uncover the wildlife secrets hidden inside. It’s a fascinating story of how nature is reclaiming and transforming the broken soil we leave behind.