Oowarai Beach

Oowarai Beach (大嗤海水浴場) is a beach and resort that can be found a few kilometres from Academy City. The beach is the primary setting of the Angel Fall Arc. The beach is famous enough to be featured on the cover of a magazine

During the duration of the arc only Index, Touma and his family are the apparent guest in the beach, as jellyfish season came early and as such turning any potential guests.

The Kamijou Family's 2nd Residence is not far-off from the beach, as taking the train would take a whole day to get there-and-back.

Appearance
The beach is fairly large, though it is poorly maintained as rubbish can be found in the waters.

Overlooking the beach is the resort, situated on top of a hill. The resort is large enough to hold an arcade and separate hotsprings for the two genders. From the hill, one can see a scenic view of the nearby town and the ocean.

Angel Fall Arc
Touma is forced to go on a vacation at the urging of Tsukuyomi Komoe as a way to slightly curb the increased hostility of delinquents towards Touma after defeating Accelerator in attempt to gain prestige. Here, Index and Touma utilize the various facilities of the resort, while waiting for the arrival of Touma's parents.

Touma later discovers after much trouble, that Angel Fall has been activated and that everybody's appearance apart from his and the spellcaster's have been switched. Here, Touma meets Kanzaki Kaori for the first time since losing his memories, as well as Misha Kruezhev, and discovering that his friend Tsuchimikado Motoharu is a spy in Academy City.

Eventually, Touma figures out that his father, was the culprit of Angel Fall out of sheer coincidence. However, Misha who is actually Archangel Michael (the angel who fell) tries to attack them, since he desired to return to heaven, since killing the spellcaster will negate Angel Fall. Kaori however, arrives and preoccupies Michael – who she confuses as Archangel Gabriel – while Touya and Touma try to find a way to cancel Angel Fall.

Angel Fall was eventually cancelled with the help of Motoharu, who used his magic to destroy the ritual location – the Kamijou Family's 2nd Residence.

Trivia

 * Touma comments on the suspiciousness of the beach, since it can be roughly translated as Big Joke/Big Jeer/Big Laugh.
 * It may be a pun of Oarai Beach in Ōarai, Ibaraki.