Land of Ooo

A land filled with fields and mountains was once visited by the Twelfth Doctor.

History
After some adventures, Batman, Gandalf, and a woman reunited in the land, before being joined by a human and a yellow dog. Gandalf later ran through the land, towards the area where the Doctor's TARDIS was materialising. The Twelfth Doctor then jumped out of the TARDIS and onto a spring pad, flying into the sky.

A man, also present in the field, saw this while driving his van. Shortly after, he drove through a puddle, splashing the Wicked Witch of the West and a furred individual with water.

Many individuals, including the Doctor, then charged into battle, before winding up in a mosh pit. At another point, an individual with green skin was in the field, but was stuffed into a man's briefcase. (WC: New Adventures Await!)

Behind the scenes
The Land of Ooo is the main setting of the animated series Adventure Time, from which Finn the Human, Jake the Dog, and Marceline the Vampire Queen also hail.