The Paris Opera, designed by Charles Garnier and completed in 1875, is an architectural marvel renowned for its stunning Beaux-Arts style. One of its most iconic features is the grand staircase, made from white marble and adorned with red and green marble balustrades. This opulent setting inspired Gaston Leroux’s novel The Phantom of the Opera, which features an underground lake beneath the #opera house—actually a real water reservoir used for firefighting. 📸: 
