i have seen many mountains but just a few impressed me. One of them is Mount Etna.
It is in Sicily island(belong to Italy) and the highest mountain of Europe continent. It is an active volcano that called stratovolcano. When i visit there it was "silent" but as you can see from photos, there was some smokes.
It has an impressive view when looking from Catania sea side.
I took photos from airplane.
Enjoy!