Western Isles on Wikipedia.

The following islands have their own sub-page - Barra, Harris, Lewis.

Am Baile (Eriskay), St. Michael (R.C.). © Carol Myers. Link.

Barra (island).

Bayhead (North Uist), Free Church of Scotland. © Carol Myers. Link.

Carinish (North Uist), Church of Scotland. © Carol Myers.

Garrynamonie (South Uist), Our Lady of Sorrows (R.C.). Another view. Both © Carol Myers.
Griminish (Benbecula), Church of Scotland. © Carol Myers. Link.

Harris.
Hougharry (North Uist), Kilmuir Old Church. © Martin Briscoe.

Lewis.

Vatersay (island), Our Lady of the Waves and St. John (R.C., 1913) at NL 646 961. Two interior views - 1, 2. All © Tim Flitcroft (2013). Link.