Not going to be terribly adventurous in my choices here I'm afraid, and with profound apologies to Sunkenkirk, White Moss and Castlerigg...

1. Cnoc Fillibhear Bheag

http://www.themodernantiquarian.com/site/202/cnoc_fillibhear_bheag.html

Always feels such a special, peaceful place. Whenever I visit I never want to leave.

2. Na Dromannan

http://www.themodernantiquarian.com/site/2965/na_dromannan.html

An intriguing site, I wonder just what stories the stones have to tell.

3. Callanish I http://www.themodernantiquarian.com/site/198/callanish.html

Preferably out of season, in that soft early morning / late afternoon Hebridean light.