Geneva on Lake Geneva (but it is actually called lac lèman in French)
Neuchâtel on lac de Neuchâtel
Biel on Bielersee
Thun on Thunersee
Zürich on Zürchersee
Lugano on Lago Lugano.
And lots more smaller lakes.
There are many Swiss towns and cities which are also the name of lakes. For example (in each case the names are in language of the locality):
The following are only the same as the name of the lake in English, not in the language actually spoken there:
I suspect you mean Geneva and Lake Geneva, but it's really hard to tell from such an ambiguous clue.
The Swiss city that also bears the name of a lake is Geneva.
Genevo
Geneva!
Luzern.
Lake Geneva, in English and Lac Genevieve in French
Washington island.
In 1291 three states of nowadays Switzerland agreed to defend their territory together... today there are 20 full and 6 semi-states (states are called cantons in Switzerland). One of the founder states is named Schwyz, giving the name to the country later on. The same can be said for its flag... the state has a white cross on red ground as the country. By the way the inverted colors gave the flag of the international red cross...
No. Bears are not indigenous to the UK
There are no Polar Bears anywhere near Lake Baikal.
Being landlocked, Switzerland does not have a navy, but it does maintain a fleet of military patrol boats, armed with two 12.7mm machine guns, numbering 10 in 2006. They patrol the Swiss lakes: Lake Geneva, Lake Lucerne, Lake Lugano, Lake Maggiore and Lake Constance. These boats are sometimes humorously referred to as the "Swiss Navy".
Washington island
The Polar Bears is we're it's at. Go Polar Bears