The complex of smeltmills comprising Old Gang are generally believed to be the best preserved in the Yorkshire Dales, and the most structurally complex in the whole of the Northern Pennines. In addition to those visible above ground there are many buried archaeological deposits continuing to survive.

The complex structure of the Smelt Mill remains extend up Healaugh Side. The whole of the Old Gang Smelt Mill complex is a scheduled monument, including the discharge flue that extends underground to emerge atop Healaugh Crag (563m) on Surrender Moss.

Inside the Smelt Mill are many mining relics. On the exterior wall is a plaque stating that the property is a Scheduled Monument.

there are a number of mine entrances extending into the hillside, similar to this image taken from the Smelt Mill.

There are 2 smelt mills, one higher up Healaugh Side, marked on the OS as Stone Pillars. This is another mine entrance from the lower smelt mill, which is located on the Mill Gill's flood plain.

There are many buildings around the Smelt Mill, serving various purposes such as a dressing floor, peat storage, miners' office, etc.

This building is well preserved and stands separated from the main Old Gang complex.

The large upright pillars are all that remain of the huge peat store located part way up Helaugh Side, above the smelting mill. The peat store is more than 100m long and divided into 3 sections, each of which could hold one year's supply of peat. Below the peat store is another adit entrance to the mine.

Most of the mine entrances can still be accessed for some considerable distance, revealing walls coated in galena. Most of the mine entrances have shallow water running through them.

An old packhorse bridge spans Mill Gill, opposite to the stone pillars of the peat house. The Old Gang Road which the Gill runs beside is the route shared by the Coast to Coast path.

Hard Level Force, in dry weather, is not much more than a trickle, but in wet weather it is quite dramatic. A little climb is necessary to see the waterfall, but it is worth the effort. The Force is located very near to Ash Pot Gutter, but it is actually on the Hard Level Gill.

Level House Bridge spans the Hard Level Gill (which becomes the Mill Gill further downstream) at an important cross roads. The Coast to Coast path crossing Melbecks Moor from Lownathwaite arrives at this junction and heads south to Healaugh. The road heading north leads to Great Pinseat (583m) on Surrender Ground, and to an amplitude of different mines.

On the opposite side of the path to North Rake Hush a side track leads through the remains of Moor House, built c1660. One occupant of the house, in the 19th century, lived there with his wife and 21 children. Farmers would often spend their time working on their farm and doing part time mining at Old Gang.