All but the most select few are banned from a tiny landform which is one of the newest and best protected islands in the world.
Surtsey Island is one of the most difficult places one could hope to visit.
The volcanic outcrop sits about 20 miles off the south coast of Iceland and is the country's most southerly point, and certainly one of its most remote.
All Icelanders over the age of 59 were born into a pre-Surtsey world as the unloved looking landmass didn't come into existence until November 14, 1963.
Four years after molten rock from an underwater volcano 130 metres beneath the water's surface first broke into the air, the island stopped growing.
It settled at a total area of one square mile.
What marks Surtsey out from the other volcanic islands which occasionally pop up out of the ocean is that it's been protected from the moment it appeared.
Scientists are the only people allowed onto the island, and they try and leave as little trace as possible.
Instead they observe as life springs up on the wind swept and soggy rock, watching as eco system form beyond the influence of humans.
Unesco, which works to preserve remarkable places around the world, writes: "It is all the more outstanding for having been protected since its birth, providing the world with a pristine natural laboratory.
"Free from human interference, Surtsey has been producing unique long-term information on the colonisation process of new land by plant and animal life.
"Since they began studying the island in 1964, scientists have observed the arrival of seeds carried by ocean currents, the appearance of moulds, bacteria and fungi, followed in 1965 by the first vascular plant, of which there were 10 species by the end of the first decade.
"By 2004, they numbered 60 together with 75 bryophytes, 71 lichens and 24 fungi. Eighty-nine species of birds have been recorded on Surtsey, 57 of which breed elsewhere in Iceland.
"The 141 ha island is also home to 335 species of invertebrates."
The only significant human impact is a small prefabricated hut which is used by researchers while staying on the island.
The hut includes a few bunk beds and a solar power source to drive an emergency radio and other key electronics.
A group of young boys once rowed from a nearby island to Surtsey and planted some potatoes, but these were quickly pulled up from the ground and discarded.
At one point an "improperly managed human defecation" resulted in a tomato plant taking root, but that was also destroyed.
All those who are given permission to go onto the island have to be thoroughly checked for seeds to ensure they're not going to accidentally trigger some unwanted life.
