Think of great views and varied, interesting scenery. Because these areas were not so suitable for intensive agriculture they are relatively intact cultural landscapes where you find traces and trails of ancient cultures. As a result of man's low impact in mountain areas, there is also still a lot of wildlife to see such as flowery alpine grasslands and impressive birds of prey.
It is not always necessary to be a very fit walker to experience the grandeur of the mountains. There are very beautiful mountain regions in Europe that are very developed walking and hiking tourism regions. Here cable cars can take you in a short while up to a higher level, from where you can explore a wide range of amazing mountain trails or sometimes even plateau walks through alpine meadows with stunning views all around.
Other mountain areas in Europe are relatively "undeveloped" from a walking tourism point of view, and these areas are great for those looking for a holiday off the beaten track. Here you can still experience the wilderness and grandness of nature and solitude that can help you re-charge your batteries.