Tyria (world)

From Guild Wars 2 Wiki

Tyria is the name of the world. There are currently three known continents on this planet, Tyria which shares the name of the world, Cantha, and Elona. There is believed to be more continents out there, but the name and shape of these locations is still unknown. The world is suspected to be over 11,000 years old, which is the last known occurrence of the Giganticus Lupicus and of the the Elder Dragons before their hibernation, though these creatures are only known to have inhabited the northern continents of Tyria and Elona. There are many races in the world of Tyria, many known, and many more unknown. While it has been believed that Tyria was the first planet created, it is now known that it is in fact not, though how many planets predate Tyria in the multiverse is unknown.

The Guild Wars Wiki has an article on Tyria (world).