Seacliff defies its urban status with beaches (China Beach and Baker Beach) mansions - sharped eyed visitors may spot Cheech Marin on his morning jog :)
Others must settle for a beautiful neighborhood with many of the city's finest views and beaches.
Getting hungry? There are a couple well-regarded Mexican places nearby. Gordo Taqueria (23rd and Clement) is a favorite burrito shop and Tommy's is a restaurant with devoted following and often crowded. Trad'r Sam's (26rd and Geary) provides a break from civilization in the form of sugary tropical beverages :)
The lively Bazaar Cafe hosts (truly) independent live music, food and beverage.
Wikipedia: http://en.wikipedia.org/wiki/Sea_Cliff,_San_Francisco,_California