Begun in 1938, the ouvrage consists of one infantry block about one kilometer northeast of the town, in the village of Le Chatelard. A short gallery with cross galleries extends into the rock, with an emergency exit and ventilation shaft halfway back. The "ouvrage" was incomplete in 1940, under the command of Sub-Lieutenant Bochaton. The railway station is linked to the TGV network and has services direct from London in winter. The "Arc en Ciel" funicular railway links the town to the Arc 1600 ski area. There is a primary school on Rue de la Rosière, and language and ski schools. The Catholic church of St Maurice is on the Grande Rue in the centre of town, the Protestant church is on Avenue Maréchal Leclerc to the south. Bourg is also a popular summer destination, as it offers much to lovers of the outdoors and watersports. There is a whitewater slalom course on the Isere river used for international canoe and kayak competitions. The course on the Isere has been host to the ICF world championships and is used by many European teams as a training course in the summer. The course is often changed by the floods that occur during the winter months. The surrounding mountains are good for walking and mountain biking. They also are a good place for paragliding and hang gliding. Some of Les Arcs ski lifts operate during July and August to get walkers to the higher peaks and you can take mountain bikes up on these. Mountain bikes ("vélo tout terrain" or "VTT" in French) can be hired in both Bourg and Les Arcs. Some of the high altitude restaurants open in these months, the ones at Pre st Esprit and L'Arpete have small outdoor pools. The nearest summer glacier skiing is in Tignes (approximately 27 km from Bourg) on the Grande Motte; due to glacial recession, however, it is now closed at certain times of the year.