About two weeks ago, when it weather was clear I headed up to the Mt. Diablo Summit. I didn't hike up there but I drove and took some pics of the view:
What was super cool was that I got see the Mt. Diablo Beacon. The Beacon was originally lit by Charles Lindbergh in 1928 to help with aviation in the early days. It was lit every night until December 8, 1941 (The day after Pearl Harbor). It wasn't re-lit until December 7, 1964 and is relit every December 7th: