Here's a sad example of one of those areas, Las Colinas, Irving, Texas.
Originally, Las Colinas was supposed to be a mixed-use neighborhood designed to look like Venice (with office towers) complete with canals and gondolas. A real estate crash in the 1980s caused the project to be stopped halfway through development, but this is what they built:
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It also has a elevated airport style train to move people between buildings (not currently operating):
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The land got sold to some cheap developers who built nothing but generic apartment buildings on the empty land:
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Before:
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After (everything on the east side of the lake looks like the above picture):
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So sad that the original vision was never completed because we needed cheap housing for H-1Bs.