Antarctica

Well, this would be an adventure for the really brave ones and just as mad. I'm kidding, however this would be considered as an extreme travel. Antarctica is one of the cruelest places on Earth.
Antarctica is Earth's southernmost continent, overlying the South Pole. It is situated in the southern hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14.4 million km² (5.4 million sq mi), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. Some 98% of Antarctica is covered by ice, which averages at least 1.6 kilometres (1.0 mi) in thickness.
On average, Antarctica is the coldest, driest and windiest continent, and has the highest average elevation of all the continents. Since there is little precipitation, except at the coasts, the interior of the continent is technically the largest desert in the world. There are no permanent human residents and there is no evidence of any existing or pre-historic indigenous population. Only cold-adapted plants and animals survive there, including penguins, fur seals, mosses, lichen, and many types of algae.
Antarctica has no permanent residents, but a number of governments maintain permanent research stations throughout the continent. The number of people conducting and supporting scientific research and other work on the continent and its nearby islands varies from approximately 4,000 in summer to about 1,000 in winter. Many of the stations are staffed year-round.
Antarctica is divided in two by the Transantarctic Mountains close to the neck between the Ross Sea and the Weddell Sea. The portion west of the Weddell Sea and east of the Ross Sea is called Western Antarctica and the remainder Eastern Antarctica, because they roughly correspond to the Western and Eastern Hemispheres relative to the Greenwich meridian.
Antarctica has no government and belongs to no country. Various countries claim areas of it, although as a rule, no other countries recognize such claims. The area between 90° W and 150° W is the only part of Antarctica, indeed the only solid land on Earth, not claimed by any country...(more on www.wikipedia.org)