This is from the Vedas Srimad Bhagavatam.
SB 8.15.10-11: When he assembled with his own soldiers and the demon chiefs, who were equal to him in strength, opulence and beauty, they appeared as
if they would swallow the sky and burn all directions with their vision. After thus gathering the demoniac soldiers, Bali Mahārāja departed for the
opulent capital of Indra. Indeed, he seemed to make the entire surface of the world tremble.
SB 8.15.16: The city was full of courtyards, wide roads, assembly houses, and not less than one hundred million airplanes(vimanair nyarbudair). . The
crossroads were made of pearl, and there were sitting places made of diamond and coral.
SB 8.15.23: Bali Mahārāja, who was the commander of numberless soldiers, gathered his soldiers outside this abode of Indra and attacked it from all
directions. He sounded the conchshell given him by his spiritual master, Śukrācārya, thus creating a fearful situation for the women protected by
SB 10.76.3: Śālva swore in the presence of all the kings: "I will rid the earth of Yādavas. Just see my prowess!"
SB 10.76.4: Having thus made his vow, the foolish King proceeded to worship Lord Paśupati [Śiva] as his deity by eating a handful of dust each day,
and nothing more.
SB 10.76.5: The great Lord Umāpati is known as "he who is quickly pleased," yet only at the end of a year did he gratify Śālva, who had
approached him for shelter, by offering him a choice of benedictions.
SB 10.76.6: Śālva chose a vehicle that could be destroyed by neither demigods, demons, humans, Gandharvas, Uragas nor Rākṣasas, that could travel
anywhere he wished to go, and that would terrify the Vṛṣṇis.
SB 10.76.7: Lord Śiva said, "So be it." On his order, Maya Dānava, who conquers his enemies' cities, constructed a flying iron city named Saubha
and presented it to Śālva.
SB 10.76.8: This unassailable vehicle was filled with darkness and could go anywhere. Upon obtaining it, Śālva went to Dvārakā, remembering the
Vṛṣṇis' enmity toward him.
SB 10.76.9-11: Śālva besieged the city with a large army, O best of the Bharatas, decimating the outlying parks and gardens, the mansions along with
their observatories, towering gateways and surrounding walls, and also the public recreational areas. From his excellent airship he threw down a
torrent of weapons, including stones, tree trunks, thunderbolts, snakes and hailstones. A fierce whirlwind arose and blanketed all directions with
SB 10.76.21: At one moment the magic airship built by Maya Dānava appeared in many identical forms, and the next moment it was again only one.
Sometimes it was visible, and sometimes not. Thus Śālva's opponents could never be sure where it was.
SB 10.76.22: From one moment to the next the Saubha airship appeared on the earth, in the sky, on a mountain peak or in the water. Like a whirling,
flaming baton, it never remained in any one place.
In the last acount can you see some simelareties with todays UFO phenomen? In any case I do.If interested check this info at
there is all translated veda free to read.