MashaAllah Br Zak!! That's the correct answer....some info on the subject:
Following is the mention of Masjid-e-Zirar in the Quran: “And there are those who put up a mosque by way of mischief and infidelity, to disunite the Believers, and in preparation for one who warred against Allah and His Messenger aforetime. They will indeed swear that their intention is nothing but good; but Allah doth declare that they are certainly liars”. (9:107)
This mosque was built by Munafiqeen (hypocrites) as a meeting place with a view to conspire against Islam and Muslims. It was constructed opposite Masjid-e-Quba. Since sincere Muslims usually prayed in the Prophet’s (Pbuh) Mosque and since Masjid-e-Quba was in the outskirts of the then Madinah city where it was inconvenient for people to go for prayers, they had chosen the conspiracy site in the name of a mosque. All-knowing Allah informed the Prophet about this through the Quranic revelation. As it had been prohibited by Allah to pray in a structure called mosque that was founded for the purpose of de-stabilising Islam, the Prophet ordered that it should be demolished. Though another new mosque was never built there, the state and the people knew of the spot till very recently i.e. early eighties of the 20th century. The Turks, during their reign had built latrines at the site so that no devout Muslim could offer Salat there by mistake. “Never stand thou forth therein (for prayer)”, was the order of the Quran (9:108). The Arabic word ‘Abadaa’ indicated that the prohibition was for all times to come.