Colin H
Google
This is an amazing, huge place that is only partly developed.
The site is well-organised, and there are 3 different routes to follow, the red route being the most strenuous and interesting.
There are plans to develop the site further, including the restoration of some of the buildings and conversion into a hotel.
Although parts of the site are not suitable for the less able, there is still a lot that is suitable, and it's well worth the visit.
Recommended.