An amazing piece of nature in the Santa Monica mountains where you can hike or bike on trails. They are several miles long!
Wikipedia http://en.wikipedia.org/wiki/Topanga,_California#Topanga_Canyon
More information http://www.parks.ca.gov/?page_id=629
Address Topanga 90290, United States
Coordinates 34°7'50.699" N -118°35'39.794" E