Paris owes both its development and much of its visual appeal to the Seine River, which weaves through its heart. Each bank of the Seine has its own personality; the Rive Droite (Right Bank), with its spacious boulevards and formal buildings, generally has a more sober and genteel feeling than the more carefree and bohemian Rive Gauche (Left Bank) to the south. The historical and geographical heart of the city is Notre-Dame Cathedral on the Ile de la Cité, the larger of the Seine's two islands (the other is the Ile St-Louis).

The best way to get to know Paris is on foot, although public transportation---particularly the métro subway system---is excellent. Serious explorers should buy a Plan de Paris booklet, a city map-guide with a street-name index that also shows métro stations (note that all métro stations have a detailed neighborhood map just inside the entrance).
Here's our highly selective list of the very best things to see and do in Paris.