St Kilda is an isolated archipelago situated 40 miles west-northwest of North Uist in the North Atlantic Ocean.
It contains the westernmost islands of the Outer Hebrides of Scotland.
The largest island is Hirta, whose sea cliffs are the highest in the United Kingdom.
The UK's only dual UNESCO World Heritage Site, and one of only 39 in the world.
Home to nearly 1 million seabirds, including the UK's largest colony of Atlantic puffins.
Evacuated on 29 August 1930 after the remaining 36 islanders voted to leave as their way of life was no longer sustainable.