You can find out about the project here:
Hi @wander-lust. Welcome to steemit. Your travel content is great. As one of the editors for @steemitworldmap’s daily #traveldigest, I would love to see this post pop up on http://steemitworldmap.com. If you're interested, simply go to the website, click on code (down the bottom) and add a short description. It will then generate the code you need to copy and paste into your post to have it show up on steemit worldmap. There’s also a FAQ section if you get a bit lost.
https://steemit.com/travel/@steemitworldmap/steemit-worldmap
What does this do? Just show all travel post locations available on Steemit?