The average altitude of the city is about while the lower part of it is only around , at the level of the lake. of the Lac du Bourget watershed is occupied by the spa town of Aix, which borders on the shore. The lake is primarily fed to the south by the waters of the Leysse, and to the east, by those of the and the , both from the Aix territory. Native fish can be admired in the aquarium of Aix. The shore, which is occupied by Aix and Tresserve, is highly urbanized and developed along the northeastern part with the road and the railway track. Many restaurants and nightclubs are located there (mostly on the southeastern side). A nautical complex was built on its shore, this includes a swimming pool and a beach which has an Art Deco-style main entrance dating from 1936. After which is a vast esplanade, allowing walkers to stroll and special events to settle temporarily on this site. It offers a panoramic view of the lake and the Dent du Chat, where birds such as mute swans, mallards, grey herons, black-headed gulls and common moorhens can be found. The esplanade is bounded to the north and to the south by the Grand port and the Petit port respectively, thus constituting the Aix port which is the largest fresh water port in the country with 1,500 mooring rings, having privileged places for boating on the lake, with boats having a summer or annual allocation. The festival of yachting takes place each year. This event has old boats coming from all horizons, a professional market, demonstrations and shows. The slopes above the lake that culminate in the Tour de l'Angle Est, which overlooks the town and lake at a height of . The western shore of the lake is narrower as the mountains along its edge are closer to the lakeshore, although lower than those on the eastern side. The lake drains out of its northern end into the River Rhône about to the north. Neighbouring communes The municipality of Aix-les-Bains is bordered by nine communes. To the north, the municipality adjoins the territory of Brison-Saint-Innocent. To the northeast, Aix is bordered by the commune of Grésy-sur-Aix. Then, to the east, in the continuity of the Aix heights, the commune of Pugny-Chatenod is followed by the commune of Mouxy towards the southeast. Further to the