2. San Diego, Calif.
Population: 1,402,838. Listed historic buildings per 100,000 people: 6.2. Parks per 100,000 people: 8. Quality of green parks/100: 77.3. Percentage of hotels that are ‘boutique’: 4.19%. Instagram posts: 20.5 million. Air pollution score/100: 26.52. Dirty and untidy score/100: 32.47. Noise and light pollution score/100: 45.45. Overall city aesthetic score/10: 7.05.
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