Upaśāṇtaśivatīrtha (Upasantasivatirtha) was a famous place of pilgrimage in Vārāṇasī (Varanasi).

Aiyangar Kṛtyakalpataru of Bhaṭṭa Lakṣmidhara(p.52.)
LIngapurāṇa(1.92.107.)