Logan Rock, Trereen Dinas (South). A good scramble to get to the far end of the promontory.

There is another Trereen Dinas at Gurnard's Head on the north coast. They are both iron age clifftop fortifications. This one near Porthcurno is known as The Logan Rock due to a rocking stone on the summit which was dislodged by a young naval officer early in the 19th century. He had to put it back at his own expense; he did so, but it no longer rocked!
The rock is in the middle of the photo slighter above centre.
For Pam!