An open field or mosque area that may host a large Eid al-Adha prayer congregation is an Eidgah.
The word Eidgah, also written Idgah, literally refers to a site associated with Eid observances. In South Asian Muslim communities, it usually means an open-air enclosure, often outside a town or on its outskirts, reserved for the large morning prayers of Eid al-Fitr and Eid al-Adha.
Eidgahs are distinct from a mihrab, which marks the direction of prayer inside a mosque, and a minbar, the pulpit used for sermons. A madrasa is an educational institution, not specifically a prayer ground. Depending on local custom and available space, Eid prayers may also take place in a mosque or another open musalla.
The tradition reflects the communal character of Eid prayer: worshippers gather in unusually large numbers before the day’s celebrations and, for Eid al-Adha, the sacrifice and sharing of meat. The first Eidgah is traditionally associated with the outskirts of Medina.