Photo by Janet Baxter
Situated just off the Pembrokeshire coast near St David's, this island is a wildlife haven and RSPB nature reserve.
It has mixed habitats with sea cliffs and heathland providing a range of wildlife with prime locations for breeding.
Species such as ravens, buzzards, peregrine falcons, northern wheatears, gulls, auks, Manx shearwaters and guillemots all call the island home.
But it has the distinction also of being southern Britain's most important grey seal population, as well as being one of Wales' best chough sites.
The reserve can be accessed from Easter to 31 October from St Justinian's RNLI lifeboat station.
See Also
Elsewhere on the BBC
Elsewhere on the web
Weatherman walks
Have a go
Try one of the walks from Derek's latest walking series on BBC One Wales.
