quarry

In July, police arrested Collins Jumaisi Khalusha, who they described as a "serial killer", after the mutilated bodies of nine women were found in a disused quarry.

The longest trackways are 150m in length, but they could extend much further as only part of the quarry has been excavated.

The town, with its rows of old quarrymen's terraced cottages, grew around the development of slate quarrying during the 19th Century.

Some five centuries ago, the artist Michelangelo spent months sourcing 100 tons of marble from the quarry of Carrara only to discover that his patron, Pope Julius II, refused to reimburse him for it.

Diverse landscapes with good connectivity between quarries and calcareous grasslands proved to be particularly valuable.