Question: What is the ruling regarding visiting the "Seven Masaajid" or Masjid al-Ghamaamah or some of the other places that some of the pilgrims visit?

Response:
We (previously) mentioned that only the following five places should be visited:
1) The Prophet's (sal-Allaahu `alayhe wa sallam) Masjid;
2) His grave and the graves of his two companions (Abu Bakr and 'Umar (radhi-yallaahu 'anhumaa)), and the three graves are all in one place;
3) al-Baqee (graveyard) wherein is the grave of 'Uthmaan Ibn Affaan (radhi-yallaahu 'anhu);
4) The martyrs of (the battle of) Uhud, and amongst them the grave of Hamzah Ibn 'Abdul-Muttalib (radhi-yallaahu 'anhu);
5) Masjid Qubaa.

Any place other than these should not be visited. That which you mention of the "Seven Masaajid" or other than these (which you did not mention), then visiting all of these has no basis. Visiting them with the intention as a form of worshipping Allaah the Almighty is an innovation. This is because (visiting) these have not been mentioned on the authority of the Prophet (sal-Allaahu `alayhe wa sallam) and it is not permissible for anyone to establish a time, place or action if done intending to draw nearness to Allaah (as a form of worship), except with evidences from the Sharee'ah.

Shaykh Ibn 'Uthaymeen
al-Bid'u wal-Muhdathaat wa maa laa Asla lahu - Page 400;
Daleel al-Akhtaa. allatee yaqa'a feehaa al-Haaj wal-Mu'tamir - Page 113

Taken from fatwa-online.com