Hidden away in a small antiques district, not far from the Opéra Garnier, is Paris's central auction house, said to be the oldest in the world. You name it, Drouot sells it: vintage clothes, haute-couture gowns, tchotchkes, ornate Chinese lacquered boxes, rare books, art, rugs and tapestries, mid-century modern furniture, old master drawings, wine, and much more. Anyone can attend the sales and viewings, which draw a mix of art dealers, ladies who lunch, and art amateurs hoping to discover an unknown masterpiece. Check the website to see what's on the block or if you're pressed for time, bid online. Don't miss the small galleries and antiques dealers in the Quartier Drouot, a warren of small streets around the auction house, notably on Rues Rossini and de la Grange-Batelière.