Tenrou Island

Tenrou Island (天狼島 lit. Heaven Wolf Island) is the holy ground of Fairy Tail Guild, as stated by Makarov This year's S-Class Wizard Promotion Trial was held on this island. It is also the resting place of Fairy Tail's first master, Mavis Vermilion. 

Tenrou Island is well-known for its hot climate, which is not affected by other climates and weather systems on the mainland. Wendy said it's because of convection, which keeps temperatures high all year long.The lower half of the island is full of natural caves, which form a large, underground labyrinth. On the surface, the island is covered by rich, tropical jungles and waterfalls. It was serving as the battleground in the war between Grimoire Heart and Fairy Tail. It was thought to be destroyed by The Black Dragon, Acnowlogia, after the Fairy Tail and Grimoire Heart war ended. But, seven years later Ichiya tells the surviving members of Fairy Tail that Tenrou Island still exists.

Tenrou Island
Kanji	天狼島
Rōmaji	Tenrō Jima
Location Statistics
Located In	Earth Land
Controlled	Makarov
Debut
Manga Debut	Chapter 203
Anime Debut	Episode 97