Ground Omega

Ground Omega (運度所) is a training area in U.A. High School.

Description
Ground Omega is an extensive wooded area where there are some rocky hills. The entire area is surrounded by a great wall and has a single entrance with the letter omega above it. The place is used to carry out practices and school training of various kinds.

Next to the Ground Omega there is a building that serves as an observation post. The teachers monitor from the rooftop how the practices are developing inside.

My Hero Academia - Training of the Dead
Following Class 1-A's internships with Pro Heroes, Ground Omega was used by Shota Aizawa and All Might for a Survival Training exercise between Class 1-A and Isamu Academy High School students. The twenty-four students are split into six groups of four and the main goal of the joint practice session is just to outlast all the other teams.

However, during the exercise, Romero Fujimi, one of Isamu's students, uses his Quirk releasing a pink gas that transforms all those who breathe it into a zombie. The four non-students who were not affected by the gas (Izuku Midoriya, Ochaco Uraraka, Mina Ashido and Shoto Todoroki) survived the attacks of their zombified classmate until the effects of the gas end, and everybody return to normal.

Trivia

 * Ground Omega does not appear in the manga, although it could be the forested area where Kyoka Jiro and Koji Koda faced Present Mic during the final exam.