You can go to Antarctica as a tourist or as part of a scientific station and their activities or you can plan your own expedition. It is difficult to reach, stay and live in Antarctica but it isn't guarded by anyone.
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Travelers do not need permission to go to Antarctica, but tourism operators must hold a valid permit. First, a bit of background on why it is legal to visit Antarctica. Antarctica is not a country. The continent is protected by the Antarctic Treaty, which preserves it for peaceful and scientific use.
The Portal (located at78.0629°S 159.300°E) is the gap between the Lashly Mountains and Portal Mountain, through which the main stream of the Skelton Glacier enters the Skelton Névé from the polar plateau.
A rough estimate for round-trip flights to Antarctica can range from $5,000 to $15,000 per person. It's important to note that traveling to Antarctica often requires specialized flights or cruises, and prices can be higher due to the remote location.