You're already deeply addicted to exploring San Francisco. Maybe you've already immersed yourself in the newcomer's guide Everything Explained, by Thinkwalks. Now it's time to look even closer.

San Francisco has been recording (and distorting) a tangled tale through hundreds of years of amazing confluences.

It's possible to glimpse the big picture, but only if you're careful and patient.

Joel Pomerantz of Thinkwalks has untangled San Francisco's most deeply entrenched deceits and conceits for you, upending many of the stories you'll hear elsewhere.

This app leads you to DIY resources for your creative urges, plus natural and cultural spectacles of history.

Local Nerd! is part of the Know What network, a collection of apps from brilliant, informed people – each with dozens of favorite places and best local secrets. So you can always Know What, no matter where you are.