Barn (The Day of the Doctor)

The barn was a shed situated on an unknown planet that stood for many years. At least four known incarnations of the Doctor visited the barn at different points in their timestream.

During the First Doctor's childhood, he would retreat to the barn to cry so that the other children wouldn't hear him. On one such occasion, Clara Oswald landed the TARDIS in the barn and comforted the Doctor as he slept, telling him the story of how he would return to the barn one day. (TV: Listen)

The War Doctor returned to the barn, bringing with him the Moment, which he intended to use to destroy Gallifrey, the Time Lords and the Daleks. However, the Moment opened a portal to his future to show him the consequences of his actions.

The War Doctor returned from the future with the Moment ready to detonate. Soon after his arrival, the Tenth Doctor, Eleventh Doctor and a younger version of Clara Oswald arrived to assist him in Gallifrey's destruction. However, the Moment showed them the direct consequences of their actions and the Eleventh Doctor decided to alter their plan.