'That is the hermitage of Agastya built by Vishvakarma. It (The hermitage of Agastya) is one yojana in breadth and ten yojanas in height there. [4-41-36]
It is wonderful, built of gold and adorned with many gems. There (on that mountain Kunjara) stands a city called Bhogavati, which is the abode of serpents. [4-41-37]
सर्पराजो महाप्राज्ञो यस्यां वसति वासुकिः | निर्याय मार्गितव्या च सा च भोगवती पुरी || ४-४१-३९
'The wise serpent king Vasuki resides there. (Bhogavati is the replica of the city of the same name in Patala, the sixth subterranean region). Emerging from this city of Bhogavati,..... - [4-41-39]