Termina Field is a location from The Legend of Zelda: Majora's Mask. It is a region of Termina that connects all the other regions. For all intents and purposes, Termina Field serves as the game's Overworld, and is the equivalent of Hyrule Field from The Legend of Zelda: Ocarina of Time.
Termina Field is a large area that encircles Clock Town and borders Termina's various mountains, valleys, and bodies of water. A system of roads spanning the field connects Clock Town with the other regions of Termina, including Great Bay, Ikana, Milk Road, Snowhead, and Woodfall. Although vegetated mostly by various grasses, Termina Field is far from topographically featureless. The north is covered in snow and populated by Dodongos in day and Eenos at night. The western area is covered in sand and filled with Leevers. Near the entrance to the Ikana region can be found several stone pillars, Real Bombchus in daytime and Blue Bubbles at night. The southern area is filled with tall grass inhabited by Deku Babas and ChuChus, and the Takkuri flies near the entrance to Milk Road.
Near the entrance to Ikana is the Astral Observatory which cutoff behind a larger fence which acts as a barrier, though it can be by passed via a Deku Flower located in the field outside the fence and inside the yard there is a patch of Soft Soil where Link can plant a Magic Bean which he can use to leave the Observatory's fenced in yard.