The Facebook seems to be trying a new one feature which will allow you to find the nearest wireless hotspots (Wireless).
Some time ago, Facebook started asking its pages to provide Wi-Fi to their customers in their physical addresses. 
It seems that this information could be used for the new project of the social network, although the Results they could be somewhat inaccurate, as no one can say for sure if the site administrators did not lie about providing Wi-Fi.
The new feature first appeared in the iOS app but not globally. At the moment, it's not clear whether Android users have the feature. Those who were asked did not have it, but that does not mean that there are not some lucky Facebook users who have it.
As for iOS, as mentioned above, it has not been released for everyone yet.
If you're one of the lucky ones, you can spot the feature in the hamburger menu that the app has for cell phones.
