Love seeing discussions about my home country and as you can tell from my username, the Cairngorms is my favourite part of the country!
If you are coming for a visit, i would strongly urge you to check out this website - WalkHighlands. I use it for my mountain walking, but it has hundreds of the best low-level/short/long walks. You can search by area, and it has some great advice around where to visit. my hillwalking bible!
Discover Scotland, one step at a time with Walkhighlands. The ultimate website and app for walking and hiking in Scotland, with thousands of free detailed descriptions of walks, places to stay, and GPS mapping.
www.walkhighlands.co.uk