Roundstone Wood
From Tardis Wiki, the free Doctor Who reference
Roundstone Woods was a forest just outside of Cardiff. It was in this forest that Estelle Cole encountered the fairies. In ancient times it had been considered bad luck to walk through the woods or even to collect timber from it. Romans occupying Great Britain stayed clear of the area. (TW: Small Worlds)
Behind the Scenes
Roundstone Woods does not exist in the real world.