Along the Atlantic facing coast, magnificent white sandy beaches can be found. Luskentyre Beach, for example, is about 15 minutes away by car and has won international awards. Wildlife abounds. Fishing for brown trout is a very popular occupation and most lochs carry a natural stock of fish. A great many species of birds and sea dwellers can be seen. A trip to Saint Kilda on Kilda Cruises (http://www.kildacruises.co.uk) opens the door to some amazing and immense sea bird colonies. The story of St Kilda makes fascinating reading and if you do go there a camera is essential.
If you are a keen stargazer, you might want to bring your telescope as light pollution is minimal and on a clear night it's a fabulous place to look at the stars and perhaps see the Northern Lights (Aurora Borealis).
As well as fishing, playing golf, walking, climbing, day tripping to other islands, enjoying the wildlife, sea life, bird watching or doing absolutely nothing the islands also have a huge range of items of historical interest such as the Lewis Chessmen, the Callanish Stones (as old as Stonehenge) a Blackhouse, a Norse Mill, the Carloway Broch and the mysterious Flannan Isles.