Squares & Avenues — Paris

The nearly two-kilometre avenue running from Place de la Concorde to the Arc de Triomphe, laid out in the 1600s and long billed as "the world's most beautiful avenue."

Paris's largest square, laid out in the 1750s for a statue of Louis XV, later the site of over a thousand guillotine executions during the Revolution, now centred on a 3,300-year-old Egyptian obelisk.

Paris's oldest planned square, built by Henri IV from 1605 as a uniform arcade of 36 red-brick pavilions, later home to Victor Hugo, now the elegant heart of the Marais.

The curved 1937 Palais de Chaillot and its terraced gardens face the Eiffel Tower directly across the Seine, offering what is widely considered the single best photograph of the tower in Paris.