We’d seen the skeletal remains of Kernic in books and always been impressed with it, not least because it’s right on the beach, and at high tide gets (mostly) covered by the sea.
As sea levels have risen since ancient times, it’s left Kernic stranded (in the literal sense of that word, at the strand line), so you can only see all that is left of the monument at low tide.
Climb down from the dunes and among the tethered boats on the beach, below some rocky tors overlooking the estuary, the ‘bones’ of the monument are easy to spot; the passage and some kerbstones.
The mound and capstones have long ago been washed away and seaweed covers the lower portions of the stones. It’s very cool. A must-see.