What to do in San Diego, California (San Francisco)

Hey guys! I'll be traveling to San Diego, California for an Internet Marketing event from the 2nd of June to the 8th of June. 2nd and 7th will be free for me to travel around. Do you have any TIPS or MUST DO, MUST SEE's in San Diego that you could suggest?

Maybe we could meet. I just saw there is a group for people living in San Diego to organize an event. Protected content

Maybe we could arrange something (event at a small level).

Looking forward to hearing from you and meeting some of you as well. Have a great weekend.

Best,
EDUARDO