Vishwamitra Ashram at Bisaul village of Madhubani district in the Mithila region of Bihar was the residence place related to the Vedic sage Vishwamitra in Ramayana.

It is located near the capital city Janakpur of ancient Mithila Kingdom.

It was built by the King Shreedhwaj Janaka of Mithila as the residence place for the Vedic sage Vishwamitra.

[8] There is a small village nearby called as Phulhar witnessed the first meeting of the Prince Lord Rama and Princess Goddess Sita in Treta Yuga era.

When both brothers Lord Rama and Lord Lakshmana were staying in the Vishwamitra Ashram Vishaul and they went to the garden to pluck flowers for their Guru Vishwamitra, Goddess Sita was also there for worshiping Goddess Girja.