The Summer Isles
Other than walking on Tanera Mor, you can only see what your excursion allows but this includes great cliff scenery, seascapes and views of the mainland, grey and common seals and numerous breeding seabirds in season.
Of all the islands only Tanera Mor is inhabited and hardly anybody stays all through the winter. In the summer some houses, including the former school, are available for rent. Painting and photography classes are also run.
There are numerous footpaths around much of the island from the landing stage.
Almost unbelievably, Tanera Mor shares one characteristic only with Lundy in south-west England and Caldey Island off the coast of Tenby, Wales out of all the islands that form part of the UK. It issues its own postage stamps, which are valid throughout the UK. Currently valid stamps only cost their face value and make a talking point! Of course there are numerous historic sets on sale as well at the 'Post Office.' 
Eat and drink
Beverages and light snacks are also available in the Post Office and are worth their weight in gold, if only because the building provides a shelter from the midges.