Abu Salt Abdussalam ibn Saleh Hijazi Heravi, known as Khajeh Aba Salt Heravi was one of the closest companions of Imam Reza (AS). Tomb of Khajeh Aba Salt Heravi is located 14 kilometers to the southeast of Mashhad. The structure is tetrahedral with four entrances located on four sides of it. Adornments of this building include seven-color tiles, mirror work as well as two porches.