This is the James Bond's fatherland from a Skyfall movie:) 

Glencoe, Glen Etive and Buachaille Etive Mòr.

Buachaille Etive Mòr (½ day hike)

Steep ascent to a ridge (1000 m) and return by a river Coupall. 

We did just a shorter part of the ridge up to up to Stob da Doire (10 km, 700 m ascend), but the full ridge can take up to 7-9 h (13 km, 1110 m ascend). 

Access: car or nearest stop is The Kingshouse on A82. 

More info