When you travel to the Isles of Scilly on the Scillonian you can’t fail to notice St Michael’s Mount in Mount’s Bay next to Marazion – it is one of Cornwall’s most iconic places. It is a Castle set high up on an island just off the shore. It is owned by the National Trust and is managed jointly with the St Aubyn Estate who donated the property to the NT. See here for further details. If you are planning to visit you need to note that the property closes on the 1st November and isn’t open again until next February half term.
Cut off from the mainland at high tide but is accessible by foot at low tide.
It was a pretty good sunset out west over Penzance too
A Dartmoor blog 
Our assistant woodsman is from down that way and used to have a job which involved the occasional helicopter commute to the Scillies, he says the return trip gave a fantastic view of the Mount.
He’s right it was brilliant – such a shame the helicopter has stopped