Thonon-les-Bains
Only gets a page because it is one end-point for several classic Alpine routes - notably the Route des Grandes Alpes, the Raid Alpine (Thonon-Antibes) and the Raid Alpine (Thonon-Trieste).

It's a pleasant but unexceptional town on the shores of Lac Leman, as spa towns go, nothing special..

The only ways out are south into the mountains, west into the foothills, east along the lake into Switzerland, or across the lake by ferry.

The closest decent passes are Col de Cou and Pas de Morgins.