San Francisco is a flourishing peninsular city on the California coast. Many of its urban issues are tied to the ever-expanding high-tech industry and population density, since the city of 850,000 lives on a relatively small, undulating landmass surrounded by water. The hot high-tech sector and temperate climate converge, drawing people from around the world to this picturesque city. As a result, San Francisco neighborhoods are multicultural, vibrant and lively. They are also increasingly unaffordable. Land is precious, and in San Francisco nothing is more valuable than real estate.