The three sisters of Glencoe - shapely peaks on the other side of the glen.
A range second only in height to the Nevis range, located east of the A9. There is a railway up Cairn Gorm (which is not the highest). However you make the height, it's relatively easy to walk more peaks, with excellent views.
It is the only area in the UK where wild reindeer can be seen - re-introduced from Scandinavia after becoming extinct in Scotland. Red squirrels are also to be seen in the remains of the old Caledonian Pine Forests.
Lairig Ghru - not a mountain but probably the most spectacular mountain pass in the UK - making a fine and well known walk.
Sad but true - owners of land in Highland, often absentees, have not on the whole shown much consideration for their tenants. Some of what may appear lovely, natural, unspoiled areas were actually forcibly cleared of their human inhabitants in the interests of deer hunting or sheep farming.