The neighborhood of San Telmo in Buenos Aires, Argentina, is most known as the Antique District in the capital.   Cobblestone streets, pictureseque 19th century architecture, a state of the art Modern Art Museum, weekly flea market, incredible antique stores all combine to create a wonderful neighborhood for anyone, especiallly those looking to find the new Les Halles.
The restaurant, Pasaje Solar (also an 8 room hotel built in the late 1880's) has excellent food, a great cellar and the friendliest staff I have ever seen!