Veljko Milkovic is a Serbian inventor from Novi Sad. For the past twenty years, he has been claiming that Atlantis is now at the bottom of the Danube, “more precisely, between Novi Sad, at the foot of the Petrovaradin fortress and Srem.”
To support his claim “Milkovic also collected a large amount of evidence from the bottom of the Danube. During the low water level, numerous stone artifacts with holes, various inscriptions and markings emerged, which are obviously not carved by hand, but perfectly precisely – with a laser.”
His theory is developed in his 2020 book Panonska Atlantida (Pannonian Atlantis)  with some brief notes on the internet(c). He places the Pillars of Herakles at the Iron Gates Gorge on the Danube as have several other commentators. Milkovic places Atlantis itself on the Pannonian Plain, a region where mammoth remains have been found explaining Plato’s reference to elephants.
The same report (a)(b) notes that a team of scientists from the Geological Institute in Bucharest, Romania, are investigating the Deliblato Sands in Serbia in connection with Atlantis.
The River Danube is the second-longest river in Europe, which was known to the ancient Greeks as ‘Istros’. It rises in Germany’s Black Forest and after passing through many countries, including four capital cities, it eventually empties into the Black Sea.
A number of researchers have associated the river with Plato’s Atlantis. One of the earliest was Nicolae Densusianu who proposed that Atlantis had been situated in ancient Dacia, his native Romania. Over a century later some of his ideas have been revived by other Romanian commentators such as Adrian Bucurescu and Alexandra Furdui, who also translated Densusianu’s monumental work into English.
Densusian’s nationalism is now frowned upon and there is an understandable suspicion that his modern Romanian supporters may have similar underlying motivations.
There is a gorge on the Danube known as the Iron Gates which provides part of the boundary between Serbia and Romania. Densusianu located the Pillars of Heracles at the Iron Gates, an idea supported by Ticleanu, Constantin & Nicolescu at the 2008 Atlantis Conference, who place Atlantis further west on the Pannonian Plain [750.365]. In 2020, Veljko Milkovic also placed the ‘Pillars’ at the Iron Gates on the Danube and Atlantis in the Pannonian Basin(c) in his book Panonska Atlantida .
However, Ranko Jakovlievic expressed the view that the Iron Gates section of the Danube was the location of Atlantis!
Related to this, is the claim by an anonymous ‘Sherlock’ that Pindar’s Olympian Ode 3 suggested that the Pillars of Herakles had been situated at the confluence of the Seva and Danube rivers near modern Belgrade(b).
A recent book  by Antonije Shkokljev & Slave Nikolovski–Katin also recount an ancient version of the ‘Labours of Hercules’ that took place in the Balkans.
Christian and Siegfried Schoppe locate Atlantis east of the Danube Delta on Snake Island (Zimiinyi) in the Black Sea, an idea now adopted by George K. Weller(a). [Zimiinyi, Ukrainian territory, was occupied by the Russians 25.02.22 as part of their invasion of Ukraine]
The Iron Gate(s) is the name given to a gorge on the River Danube that forms part of the boundary between Serbia and Romania. A century ago, Nicolae Densusianu proposed The Iron Gate as the location for the Pillars of Heracles, on the Danube in ancient Dacia, modern Romania.
A recent book  by Antonije Shkokljev & Slave Nikolovski–Katin has related an ancient version of the ‘Labours of Hercules’ based in the Balkan-Danube region.
Recently, Ranko Jakovljevic expressed the view that the Iron Gate section of the Danube in Serbia was the location of Atlantis.
A paper presented to the 2008 Atlantis Conference by Ticleanu, Constantin & Nicolescu [750.375] has the ‘Pillars of Heracles’ located at the Iron Gate but placed Atlantis a little further west on what is now the Pannonian Plain.
This minority view of Atlantis located in Eastern European is seen by a few commentators to be vindicated by the literate Vinca culture(b) of the Danubian region, although the Schoppes see the Vinca people as refugees from their original home in the Black Sea region(a).
For me, all those theories conflict with Plato’s unambiguous statement that the invading Atlanteans came from the west (Tim.25b & Crit.114c). In fact, what Plato actually said was that the invasion came from the Atlantic Sea (pelagos). Although there is some disagreement about the location of this Atlantic Sea, all candidates proposed so far are west of both Athens and Egypt.
The Copper Age also known as the Chalcolithic Age existed for a relatively brief period between the Stone and Bronze Ages with wide regional variations, in Britain around the 3rd millennium BC(a), while in Serbia it was as early as 5500 BC(b).
As recently as 1969, Lucile Taylor Hansen incorrectly wrote[572.116] “a copper age……..should precede a bronze age. It does not in Europe. Nor in the Mediterranean.” The lesson here is that if we think we know it all now, time will show that we are sadly mistaken.
The Vinca Culture flourished between 6,500 and 3,500 BC, in the region of the Eastern Danube and is considered to have had contact with the better-known civilisation of Sumer. It is also accepted that Vinca influenced the development of the later Minoan civilisation. This is exemplified by the Vinca writing and its close resemblance to the Linear A script of ancient Crete and the shared motif of the double axe. The Vinca Culture developed houses arranged in streets, produced high-quality ceramics and were able to fashion copper. Furthermore, there is now (2013) clear evidence of tin bronze being fashioned around 4650 BC at a Vinca site in Serbia(a).
>Although there has been no suggestion of any link between Vinca and Atlantis, apart from Christian and Siegfried Schoppe, who identified the Vinca people as refugees from Atlantis(c).<
Supporters of the early date given by Plato for Atlantis see the Vinca civilisation as evidence for the possibility of a very early culture having existed and providing inspiration for the Atlantis story. Consequently, the Schoppes have suggested that the Vinca script may have provided the means whereby the Atlantis story was transmitted, relatively intact, to the Egyptians(b).
However, it must be noted that although Vinca was ‘advanced’ it came nowhere near to the detailed description of Atlantis offered by Plato.
See: Tartaria Tablets
Nicolae Densusianu (1846-1911) was a Romanian ethnologist and folklorist, although he was born in Transylvania, at the time part of the Austro-Hungarian Empire. He claimed that ancient Dacia had been the centre of a widespread Pelasgian Empire. His major work, published posthumously, Prehistoric Dacia, includes the suggestion that Atlantis had been located in Dacia, now Romania. The text of this extensive book, in English +, is available in its entirety on the Internet.
His excessive nationalism, popular during the communist regime, is now deemed unacceptable and his work discredited.
Densusianu’s work has also been recently echoed in two books by the Serbian historian, Ranko Jakovljevic, although he moves the focus further west from Romania to his own native Serbia.
Ranko Jakovljevic is a Serbian historian who has written two books [634/5] on the possible connection between Atlantis and the Danube region. These books build on the monumental work of Nicolae Densusianu, who concentrates on the Romanian side of the river, whereas Jakovljevic seems to be more concerned with his native Serbia, west of the great river. Some of his writing is to be found on a Serbian website(a) that can be translated with your Google translator.