Eight things you didn't know about San Diego, Calif.

8. It's big. It's really, really big. A possible explanation for mellowness: While Boston is crammed into a mere 48 square miles, San Diego (like, Jacksonville, come to think of it) makes Boston look like a geographic dwarf. San Diego spreads over 372 square miles. That's a lot of McDonald's.
8. It's big. It's really, really big.

A possible explanation for mellowness: While Boston is crammed into a mere 48 square miles, San Diego (like, Jacksonville, come to think of it) makes Boston look like a geographic dwarf. San Diego spreads over 372 square miles. That's a lot of McDonald's.

(AP Photo/Mark J. Terrill)