Mont Blanc (BrE: /ˌmɒˈblɒ(k)/; AmE: /ˌmɑːn(t)ˈblɑːŋk/; French: Mont Blanc [mɔ̃ blɑ̃]; Italian: Monte Bianco [ˈmonte ˈbjaŋko], both meaning "white mountain") is the highest mountain in the Alps and Western Europe, and the highest mountain in Europe outside the Caucasus mountains, rising 4,805.59 m (15,766 ft) above sea level, located on the French-Italian border. It is the second-most prominent mountain in Europe, after Mount Elbrus, and it is the eleventh most prominent mountain summit in the world.

Twain and Joe Twichell visited Chamonix in September of 1878 to view Mont Blanc, a 30 mile long massif along the French, Swiss and Italian borders.  A Tramp Abroad contains a burlesque account of an attempt to climb the mountain.  The tale is based upon Twain's watching a climb through a telescope and an account of 11 climbers who fell to their deaths in 1870.

Bædeker Switzerland (1877) Route 53 page 221 (Chamouny)

Chambéry (UK: /ˈʃɒ̃bəri/,  US: /ˌʃɒ̃beɪˈriː/, French: [ʃɑ̃beʁi]; Arpitan: Chambèri) is the prefecture and largest city of the Savoie department in the Auvergne-Rhône-Alpes region of southeastern France. The population of the commune of Chambéry was 59,172 as of 2020, while the population of the Chambéry metropolitan area was 255,790. The city is located at the foot of the French Alps between Bauges and Chartreuse mountains, making Chambéry an important railway and highway crossroads.

Geneva (/dʒəˈniːvə/ jə-NEE-və; French: Genève [ʒənɛv] is the second-most populous city in Switzerland (after Zürich) and the most populous of the French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the capital of the Republic and Canton of Geneva, and a centre for international diplomacy. Geneva hosts the highest number of international organizations in the world.

Wikipedia

Glacier Montanvert was the common name in the 18th century for a portion of the Alps glacier, now known as Mer de Glace, on the northern slopes of the Mont Blanc massif. Alternative spellings of Montanvert include Montainvert and Montvers. The Glacier Montanvert was a popular tourist destination of European travellers and is referenced in numerous travel writings and novels of the time.
Wikipedia

A One Day  Journey from Chamouny:

Chillon Castle (French: Château de Chillon) is an island castle located on Lake Geneva (Lac Léman), south of Veytaux in the canton of Vaud. It is situated at the eastern end of the lake, on the narrow shore between Montreux and Villeneuve, which gives access to the Alpine valley of the Rhône. Chillon is amongst the most visited castles in Switzerland and Europe. Successively occupied by the house of Savoy then by the Bernese from 1536 until 1798, it now belongs to the State of Vaud and is classified as a Swiss Cultural Property of National Significance.

Gemmi Pass is a high mountain pass across the Bernese Alps connecting Leukerbad (on the south) in the canton of Valais with Kandersteg (on the north) in the canton of Bern. The pass itself lies within the canton of Valais, at a height of 2,270 metres above sea level.[2] The main trail reaches 2,322 metres.

The pass lies between the Daubenhorn (2942 m.) in the west and the Rinderhorn (3448 m.) in the east.

The pass is at the west end of the Aar Massif and at the east end of the Wildstrubel Massif. Near the pass is the Daubensee, which has no outlet above ground.

Visp (French: Viège) is the capital of the district of Visp in the canton of Valais in Switzerland.

Wikipedia

See Bædeker Switzerland (1877) Route 65 page 283 (Vispach)

Rocky ridge reached via a cog railway & offering views of the Matterhorn & the Gorner Glacier.

See Bædker Switzerland (1877) Route 66 page 287