Chapter 3 — Yuddha Kanda, Sarga 3

Valmiki Ramayana — Yuddha Kanda

Verse 3.16

लङ्कापुनर्निरालम्बा देवदुर्गा भयावहा। नादेयं पार्वतं चान्यं कृत्रिमं च चतुर्विधम् ॥

laṅkāpunarnirālambā devadurgā bhayāvahā| nādeyaṃ pārvataṃ cānyaṃ kṛtrimaṃ ca caturvidham ||

English Meaning

And dreadful and resembling a celestial citadel, Lankā cannot be ascended by means of any support. She has fortresses composed of streams, those of hills, and artificial ones of four kinds.

M.N. Dutt (1891–94, public domain)