Forbes.com has generated a list of the most expensive blocks in 10 affluent cities across the country. They are:

1. Boston, Louisburg Square: A private square in the middle of Beacon Hill, Boston’s most exclusive neighborhood. The block has long been home to the most expensive homes in the city.

2. Chicago, between Willow, Howe, Burling, and Orchard: A once middle-class area that, due to zoning changes, has seen the rise of mega-mansions.

3. New York City, between Madison Avenue, Fifth Avenue, 70th St., and 69th Street: This Upper East Side zip code is the most expensive in Manhattan, so it makes sense it should contain the city’s most expensive block.

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