It stands in front of a huge photo of the entrance to a deep mine.

The museum's walls and ceiling are set in black to give the underground feel of a deep mine.

By 1900, about 5,000 men worked in the deep mines of George's Creek.

A deep mine can also be toured for $10.

There are the true forests, the green shadows, the deep mines.

We can stand on our own two feet; deep mines cannot do so.

Yet today there are a few medium to small surface and deep mines still operating.

The first deep mine at the site was sunk in 1867.

The coal industry developed rapidly after 1870 with the onset of deep mines.

Following the miners' strike, the only two deep mines remained working in Wales.