How did the grave of Abel remain in existence after the Flood, and what made people aware of it?

The prevalence of falsehoods regarding the existence of graves of prophets and saints has led to polytheistic practices such as building domes, circumambulating them, offering sacrifices, and making vows, all of which contradict pure monotheism (Tawhid). It is difficult to definitively ascertain the ownership of many of these graves to the individuals they are attributed to. These claims have been exploited for material gain by custodians and Sufi shaykhs, leading to assertions of the same person's grave being in multiple locations, as seen with the alleged grave of Abel in Jordan, Syria, and Iraqi Kurdistan, which demonstrates the falsity of these claims.

The place of Abel's death and burial is unknown, and the revival of these fabricated sites aims to promote polytheism and innovations, and to gain financial benefit. These "shrines" over graves were not present in the favored early eras of Islam. They appeared and proliferated during the Buyid dynasty at the hands of the Qaramita and the Rafidha, who constructed these fabricated shrines and fabricated hadiths regarding their visitation, under the guise of Shi'ism, despite the Prophet (peace be upon him) forbidding the taking of graves as places of worship and cursing the Jews and Christians who did so.

There is no doubt that this grave is a fabrication and a falsehood, and that it was created to spread polytheism and to acquire wealth. It was not known during the time of the Companions and the Successors. The imams of Islam are unanimous that it is impermissible to construct these shrines over graves, or to take them as mosques, or to pray near them, or to seek them for worship, due to the Prophet's (peace be upon him) prohibition of such acts.