بسم الله الرحمن الرحيم
(Fatwa: 318=318/L)
The women can not go to Dargahs (graves of pious personalities) even with their husbands and Mahrams (father, son, brother etc) since these places are generally centres of un-Islamic activities:
والتبرک بزیارة قبور الصالحین فلا باس بہ اذا کن عجائز ویکرہ اذا کن شواب کحضور الجماعة فی المساجد (شامی: 3/151)
Also, since the women are weak in beliefs; therefore they are likely to indulge any thing that may cause kufr or shirk (infidelity and ascribing partner with Allah).
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband