It’s Ada Lovelace Day! Ada’s been getting more and more appreciation in recent years, which is fantastic.

If you’ve ever yearned for secret panels or hidden rooms in your home, MAKE is here to help. 

In 1965, National Geographic featured a 25-page spread on the 1964 New York World’s Fair, and now we can all read it for free! Isn’t the internet great? (Thanks, Ada!)