Came across a video on Rumble, which of course doesn't provide any sauce, but doing a quick Bing search provides one matching result which of course is the top result and appears to be by a "fact checker"
Eye's on, something may be breaking on Antarctica...
https://rumble.com/v1k7pod-russia-claims-to-pull-out-of-the-antarctic-treaty.html
Castle Rock (77°48′S 166°46′ECoordinates: 77°48′S 166°46′E) is a bold rock crag, 415 metres (1,360 ft) high, standing 3 miles (5 km) northeast of Hut Point on the central ridge of Hut Point Peninsula, Ross Island. It was discovered by the British National Antarctic Expedition, 1901–04, under Robert Falcon Scott, who so named it because of its shape.
Today, there is a recreation trail from McMurdo Station and Scott Base which provides access to Castle Rock year round.