Big Pit is an award-winning national mining museum and one of Wales’s leading tourist attractions, welcoming more than 150,000 visitors each year.
The former working coal mine was sunk in around 1860 and saw generations of local men spend long hours toiling underground before closing in 1980.
It re-opened as a museum in 1983, and is one of the few in the world where people can go underground, descending 300ft (90m) in the pit cage and walk through the old tunnels.
Extra investment over the years has meant that original colliery buildings sit alongside the Pithead Baths which includes an exhibition area and the opportunity to take part in a multi-media tour of a modern coal mine.
As with all national museums, entry to Big Pit is free, thanks to funding from Welsh Government.