Local authorities and experts have conducted a drone survey of a mysterious circular island known as "The Eye" in Pathum Thani after images of the site went viral on social media.
Prinya Thaewanarumitkul, a law professor at Thammasat University, posted aerial footage of the formation on his Facebook page.
Mr Prinya suggested the phenomenon may have formed naturally following the 2011 floods. He described it as a floating mass of aquatic vegetation that slowly rotates and rubs against the shoreline, gradually forming a nearly perfect circle resembling Argentina's famous floating island, El Ojo.
Following the online attention, local officials and community leaders inspected the site, which sits on privately owned land.
Drone footage revealed the pond covers more than 12 rai.
On the eastern side of the Chao Phraya River, about two kilometres southeast of Pathum Thani Bridge 1, the circular island measures roughly 100-120 metres in diameter.
Authorities are now coordinating with the landowner to see if the site could be opened to visitors.
