This is a list of some of the nicest/most famous places I'll visit in the Western Europe Mountain Route. Just click on the links to see pictures of them.
Vienna: Start of the route and one of the nicest cities in the world. Its imperial background makes it impressive.
Grossglockner and Pasterze Glacier: The highest mountain in Austria and its glacier, the longest of the country.
Stelvio Pass: Second highest road of the Alps (2757m). In the east side it has 48 hairpin turns.
Bernina Railway: The highest adhesion railway in the Alps (2253m).
Piz Bernina and Tschierva Glacier: The easternmost 4000m summit of the Alps and Western Europe.
Aletsch Glacier: The largest glacier in the Alps, with 23km length and 120km2 area. At Konkordiaplatz, its thickness is estimated to be near 1 km!!!
Matterhorn/Cervino: THE MOUNTAIN.
Mont Blanc and Lacs des Chéserys: Highest mountain of the Alps and Western Europe (4810m). The lakes offer great views and reflects of the massif.
Barre des Écrins and Glacier Blanc: The westernmost and southernmost 4000m summit of the Alps and Western Europe.
Mont Aiguille: It's said that its ascent marked the beginning of alpinism. In the medieval period it was known as the Inaccesible Mountain.
Causses: Limestone plateaus of the Massif Central. They are cut by rivers, forming canyons.
Cirque de Navacelles: A meander in the canyon that separates the Causse du Larzac and the Causse de Blandas created it.
Carcassonne: Medieval fortified city.
Canal du Midi: It's 240km long and thanks to it, it's possible to cross France by ship.
Valle de Ordesa: A perfectly U shaped glacial valley.
Brecha de Rolando: A 40m wide and 100m high gap in a rock ridge.
Cirque de Gavarnie and its waterfall: The cirque is 1500m high and the waterfall 422m, the highest of France.
Vignemale and Oulettes de Gaube: The highest french summit of the Pyrenees and the valley on its north face.
Midi d'Ossau: A majestic mountain with volcanic origin.
Salto del Nervión: The highest waterfall in Spain, with 222m.
Naranjo de Bulnes: World famous among climbers because its west face, a 550m vertical wall.
Ruta del Cares: One of the most famous routes in Spain. 12km crossing a narrow canyon 2000m below the summits around.
Camino de Santiago (Way of St. James): One of the most famous pilgrimage routes of the world. In 2012 almost 200000 pilgrims arrived to Santiago de Compostela.
Finisterre: The end of the world. Romans thought it was the westernmost point of the world.
If you want to see more pictures of the route, not only of the most famous places, you can check the parts I've already hiked in the last years:
Pyrenees: HRP (Haute Route Pyrenees - Pyrenean High Route)
Cordillera Cantábrica: ARC (2009) (2010) (Alta Ruta Cantábrica - Cantabrian High Route)
And some other hikes, here.