The Rules of the Place of Salat

1. In case of helplessness, one is allowed to pray in a moving vehicle such as a train or airplane. One is also allowed to pray in a place in which the roof is low, or whose width is narrow like in a trench or fort, or on an uneven ground.
2. According to Ihtiyat Wajib, a person must observe the proper etiquette and not pray in front or parallel to the grave of the Prophet (peace be upon him and his progeny) and the A’immah (peace be upon all of them).
3. It is Mustahab that one recites his Wajib Salat in a Masjid, and in Islam, a great deal of emphasis has been placed on this recommendation.