On the east side of Alamo Square, there is a group of Queen Anne-style houses, which won the top camera award of San Francisco tourist attractions. They are known as "Postcard Scenery Collection". They are the signs of San Francisco architecture, and the local people are affectionately called "Six Sisters". In stark contrast, behind this row of "postcard scenery" stands the Financial District of skyscrapers. Six Victorian two-storey dwellings have the same style, the same volume and different colors. These six houses are the only unaffected house in San Francisco after the magnitude 8 earthquake in 1906. They are one of the few well-preserved classical buildings in San Francisco. They have become tourist attractions. So far, the house is still inhabited.