Visited on a coast path walk from Land's End to Treen. The path is very steep in places along this section and would be difficult to access if mobility was an issue. The well itself is right next to the path so you can't miss it.
There is a good pub at Treen (The Logan Rock) and an unexpected little shop at Porthgwarra selling vegetable pasties, chocolate bars and postcards, so you're well catered for!
You can also see nurse sharks off the coast around here if you're lucky.
We didn't linger at the well or try the water, so I can't comment on any healing (or otherwise) properties.