The landmark white domes of the Sacre Coeur basilica indelibly mark the Paris skyline at the city's highest point on the Montmartre hill. Sacre Coeur features the world's largest apse mosaic, designed by Luc-Olivier Merson.

Children play in sand during the Paris Plages event in Paris, featuring palm trees, sand beaches, hammocks, lounge chairs, volleyball courts and a pool lining the 2.2-mile riverside attraction. Paris Plages (Paris Beaches), is a free summer event that transforms several spots along the Seine River into complete beaches.

A couple sits in the October sun on the bank of the Seine in Paris.

Visitors inspect jewels and paintings at the Drouot auction house, in Paris. The famous site offers 16 functioning auction rooms and is the world's largest auction house open to the public.

People stroll in the Tuileries gardens, with the Arc de Triomphe in the background.