Khadiravana is described in the Bhakti-ratnākara (Fifth Wave):

dekhaha khadira-vana vidita jagate
viṣṇu-loka-prāpti ethā gamana-mātrete

"Behold the forest named Khadiravana, renowned throughout the universe. If one comes to Khadiravana, he can immediately be elevated to Viṣṇuloka."