This site is a wiki about places and times, that uses Google Maps to tell the history of just about anything. Being a wiki means that anyone can register with the site and start a new time-line map or contribute to the existing time-lines.
All entries to the site are tied to a location on the planet and a date range. Recent entries to the wiki are shown on a Google Map on the site's home page. Clicking on one of the markers will take you to that entry's page on the wiki.
The page for each entry to the wiki contains a Google Map showing all the markers related to that time-line. Under the map further details can be added and links to all the markers on the map are listed.