At 11:00 every Saturday & Sunday from 18th June to 4th September 2016, you can travel up the Mer de Glace in an antique train carriage.
Compagnie du Mont Blanc are offering a special package where you get to travel up in the old train cars, dine at the Grand Hotel du Montenvers and then return to Chamonix on one of the standard train carriages.
The journey takes 30 minutes and when you arrive at the Grand hotel restaurant you'll be greeted with a glass of champagne, your meal and a coffe (don't forget to show them your prestige ticket!)
You can visit the mer de glace, the ice cave and the glaciorium while you're there.
Prices are 53 euros for adults (16 and over) and 33 euros for children between 4-15 years. A childrens menu is available at the restaurant.
You can book on line up to the day before your arrival. Click on the website link above. Alternatively you can book at the Montenvers ticket office.