This is #Highway1 about half a mile before reaching the #TomLantosTunnel. You can see an old military bunker on #Devil'sPeak that, thanks to erosion, has been exposed. In case you wonder, the apostrophe in Devil's Slide and Devil's Peak is likely optional, as is often the case with names.

This is the southern end of the #TomLantosTunnel at #DevilsSlide in #SanMateoCounty. To the left is parking lot and access to the recreational area that encompasses an old and treacherous section of #Highway1.