Catacombs of Paris, The underground lake at the Opera Garnier in Paris, the inspiration for Gaston Leroux's Phantom of the Opera. The Catacombs also host an ossuary housing the remains of 6 million people complete with bone lined walls.
The Paris Opera Ballet, the oldest national ballet company in the world, dating to the court of Louis XIV. Palais Garnier, Paris, France by Agathe Poupeney. Love this opera! Its where they filmed parts of Phantom of the opera too!