Ancient monuments in the Yorkshire Dales are to be put under the microscope as experts find out how they are standing up to the ravages of time and the elements.
Over the next few months, the Yorkshire Dales National Park Authority's (YDNPA) Dales Volunteers will be visiting some of the 200 scheduled archaeological sites in the Dales.
The majority are in the Craven area of the National Park and range from isolated carved stones to more than two square kilometres of mining remains on and around Grassington Moor.
English Heritage will be visiting a sample of 10 per cent of all scheduled monuments in Yorkshire and the YDNPA plans to extend that survey by looking at all publicly-accessible scheduled monuments in the park.
The latest project follows on from the success of the 'Buildings At Risk' survey in 2001/2 that involved volunteers examining more than 1,800 listed buildings. That investigation found that only eight were at 'extreme risk' compared to 41 in the previous survey carried out in 1991.
Details of the condition of all the buildings are recorded on the authority's Historic Environment Record database, which also contains information about more than 20,000 other sites and features.