The Public Test Realm contains an instance called the Dummy Foundry. Clicking on sparkling bear traps with the same name, near the porticulums in the cities, will port you to the Dummy Foundry. There you will find test dummies and Fluffy, Destroyer of Worlds (Fluffy will grant a quest to give platinum and sells nifty things like an instant level to 60). I’m speculating that this instance is also the level 25 guild dimension, Golem Foundry, reused for this purpose.
First impressions of the possible Golem Foundry. The great hall is large in both ground area and height. It’s a space meant to be used both horizontally and vertically. The whole air of the place is magitech in feel; smokey, lights glowing, frequent bursts of fire and noise constantly clattering. Any dimensioneer seeking to build in this space will need to consider how the strong architectural features will fit into their design.
It is still many, many months before the first guilds reach level 25 and we can confirm this as the Golem Foundry. Which features of the Dummy Foundry will make it to the Golem Foundry remain to be seen and this is the Public Test Realm, where every thing is subject to change.