The namesake tower gets the attention - but the hike and the views are the main attraction!
On clear days, views of the entire bay (area) delight and may inspire locales for investigation. And with a variety of paths to the tower, consider a fresh route for the trip down :)
The tower is close to North Beach and can be a phenomenal hike at night - especially for those trying to sober up, snuggle up - or both :)
Address: 1 Telegraph Hill Blvd, SF, CA
Wikipedia: http://en.wikipedia.org/wiki/Coit_Tower