Where does this data come from, and how valid is it?

The place names is based on many public sources of information. Each source of information has distinct characteristics; age of data, what counts as worthy of an entry, areas where they have many entries and areas where they have relatively few.

Complete list of resources that have been used while developing ORGMX.COM

https://google.com
https://twitter.com
https://youtube.com
https://flickr.com
https://addtoany.com
https://dummyimage.com
https://dailymotion.com
https://geonames.org
https://www.rssground.com/feeds/youtube/r/205/?campaign=youtuberss
https://embedgooglemap.net
https://flickrembed.com
https://codepen.io
https://stackoverflow.com
https://www.texelate.co.uk/blog/dynamic-automatic-robotstxt-file-with-php-and-htaccess
http://www.broculos.net/2008/03/how-to-make-dynamic-rss-feed-in-php.html
https://gist.github.com/artlung/210438
https://forums.digitalpoint.com/threads/generating-a-sitemap-from-tables-in-mysql-database.1518115/#post-12595984
https://w3schools.com
https://twitrss.me
http://makitweb.com/how-to-read-rss-feeds-using-php/
http://lorempixel.com/
http://qrserver.com/
http://api.pagepeeker.com
http://nabble.com
http://cloudflare.com
http://disqus.com
https://en.wikipedia.org/wiki/ISO_3166-1