The mine was originally sunk between 1860 and 1880.
The underground tours are led by former miners who worked in the industry before the pit closed.
The site features a 100-foot-tall headframe, or 'winding tower', which was used to lower and raise miners and coal.
Big Pit is a constituent part of Amgueddfa Cymru – Museum Wales.
The underground environment maintains a constant year-round temperature, regardless of external weather.
The mine ceased commercial coal production in 1980.
The museum complex includes the original 19th-century pithead baths.
Big Pit National Coal Museum is a functioning former mining site in Blaenavon, Wales, part of the Blaenavon Industrial Landscape UNESCO World Heritage Site. The centerpiece of the museum is the underground guided tour, which descends 300 feet into the original colliery workings led by former miners. Visitors use authentic mining equipment, including cap lamps and batteries, to explore the conditions of the industrial coal industry. Above ground, the site preserves original pithead structures, including the winding engine house and the fan drift. The museum displays social history exhibitions focusing on the lives of Welsh mining communities, coal production methods, and industrial heritage. The site also operates the South Wales Miners’ Library, housing archives related to the mining industry. The entire facility functions as an educational hub for understanding the extraction process and the impact of the coal industry on the region.
The elevated view of the pithead gear and winding house against the backdrop of the surrounding Blaenavon hills.
Book your underground tour slot online immediately upon arrival, as they have limited capacity and sell out early.
Wear warm clothing, as the temperature underground remains cool even in the middle of summer.
Prepare for low-light conditions and uneven surfaces throughout the subterranean tunnels.
Do not arrive late for your booked underground tour, as the cages leave on a strict schedule and cannot be delayed.
Underground tours may be suspended for essential maintenance on specific dates; check official website for seasonal changes.
Visitors must wear a provided helmet while underground; follow all safety instructions provided by the former-miner guides.
