Wonderland

"A specific annoying little world. Useless to me, but for your purposes, perfect"

- Rumplestiltskin to the Evil Queen Wonderland is a world featured on Once Upon a Time. It first appears in the seventeenth episode of the first season.

History
The Evil Queen banishes Cora here by pushing her through a Looking Glass that is given to her by Rumplestiltskin. ("We Are Both")

Through unexplained means, Cora manages to take over Wonderland and become the Queen of Hearts. Sometime later Henry is transported to Wonderland and is held prisoner by his wife. The Evil Queen convinces Jefferson (the Mad Hatter) to take her there to rescue him. After successfully retrieving a box from a vault belonging to the Queen of Hearts, the Evil Queen takes a piece of the Caterpillar's mushroom and places it in the box, causing her father to appear. Per the rules of his hat (which dictate that only the same number of people can exit the Portal of Doors as entered), Jefferson is unable to leave Wonderland. He is brought before the Queen of Hearts and tasked with making another magical hat. This is strongly implied to be the cause of the Mad Hatter's "madness;" his inability to create another hat to get home to his daughter. ("Hat Trick")

At the behest of the Evil Queen, Captain Hook travels to Wonderland to kill Cora so the Dark Curse can be enacted without Regina's love for her mother being a weakness. To do so, Hook's eponymous hook is enchanted to rip out a heart, and he takes a body of a dead soldier to be left behind, so Cora's body can be brought back to the Enchanted Forest. Hook attempts to break into the Queen of Heart's palace, but is arrested and taken to the Queen of Heart's herself. After a confrontation, the partership between Cora and Captain Hook is struck and the two leave Wonderland with plans to exercise revenge on the woman who sent them there. ("Queen of Hearts")

Ways to Travel to Wonderland

 * By a door in the Mad Hatter's hat, which looks like a mirror, that reaches Wonderland.  ("Hat Trick")("Queen of Hearts")
 * By a Portal, that also looks like a mirror, called the Looking Glass, that reaches Wonderland.

Inhabitants

 * Queen of Hearts (formerly)
 * Knave of Hearts
 * Queen of Hearts' Courtiers
 * Caterpillar
 * Henry (formerly trapped)
 * Mad Hatter (trapped)

Trivia

 * Some of the food in Wonderland has the power to change the size of whomever consumes it; this is a reference to the food in Alice's Adventures in Wonderland, where some of the food has the same property.
 * For unknown reasons, the Mad Hatter despises this world, even before becoming trapped and losing his mind here. Similarly, Rumplestiltskin has referred to Wonderland as an "annoying little world".