Get a Mysterious Echo from the Merchant in most villages and enter what you learn from it below.
For the walking NPCs you have to already know the location of one of the other walking NPCs.
Try using the sightings other people on your server have made!
2016-04-22 - Initial Version
2016-04-23 - Decided to unmerge the two tables
2016-04-23 - You can now share sightings with other users on your server!
2016-04-24 - Only 1 sighting allowed per type per server per user.
2016-04-24 - Fine I'll add a Captcha, now play nice.
2016-04-24 - Added identicons to the sightings... too silly?
2016-04-27 - Changed "Blazing Wind Valley" to "Island of Broken Dreams"
2016-05-26 - Autoselect most common sighting of the day
2016-05-28 - Corrected a location for Leu Ninsi (Whetstone to Swiftwind)
2016-11-18 - Launched PWBR version
2017-01-07 - Added map when hovering (coordinates from Trivia PW)
2019-11-13 - Launched PWPH version