Honestly, I'd get out as far from major cities as possible, and just enjoy the scenery/terrain. The Lochs, Skye, the Outer Isles (Lewis/Harris are specatular, North/South Uist are pretty flat) if you get chance.

Then again, I'm totally into getting out of the cities, and seeing the countryside.

Spent 3 weeks out of school many, many years ago touring the Outer Isles with the family. One of the best holidays I've ever had. :)