It was certainly wonderful and was planned and constructed by Viśvakarmā. No ordinary architect could construct such a fort within the sea, but an architect like Viśvakarmā, who is considered to be the engineer among the demigods, can execute such wonderful craftsmanship anywhere in the universe. If huge planets can float in weightlessness in outer space by the arrangement of the Supreme Personality of Godhead, surely the architectural construction of a fort covering ninety-six square miles within the sea was not very wonderful.
It is stated in Śrīmad-Bhāgavatam that this new, well-constructed city, developed within the sea, had regular planned roads, streets and lanes. There were also well-planned parks and gardens filled with plants known as kalpa-vṛkṣas, or desire trees. These desire trees are not like the ordinary trees of the material world; the desire trees are found in the spiritual world. By Kṛṣṇa's supreme will, everything is possible, so such desire trees were planted in Dvārakā, the city constructed by Kṛṣṇa.