Trethevy Quoit shrouded in mist
Access to Trethevy Quoit (if travelling by car) is from a nearby off-road parking area, through a farm gate, followed by a two minute walk across a privately owned field. The parking area is big enough for four or five cars. The cromlech is poorly cared for and deliberate ground disturbance has occurred very close to it in the past (see video here). There are information boards close to the parking area but not by the monument itself, and there are no warning signs that it may be unsafe and not to climb on it.
Administrative authority: English Heritage. Managed by the Cornwall Heritage Trust.
The Heritage Trust Cared for Rating  *  (out of 5).
Suggested improvements: Extend the no ploughing area to at least five metres round the monument. Create and maintain a pathway from farm gate to monument. Install clear signs instructing visitors not to climb the monument. One or two benches where people could pause and reflect on the monument and its setting.
For more on Trethevy Quoit see Trethevy Quoit: Cornwall’s Megalithic Masterpiece by Roy Goutté.