Architecture & Design Landmarks — Paris

Renzo Piano and Richard Rogers's 1977 "inside-out" building, its structure and utilities painted and hung on the exterior, houses Europe's largest collection of modern and contemporary art.

Charles Garnier's opulent 1875 opera house, its grand staircase and gilded auditorium capped by a Chagall ceiling, inspired Gaston Leroux's Phantom of the Opera.