Tibet

Tibet is a country in central Asia. It is the highest region on Earth, encompassing a large portion of the Himalayan mountain range. In the mid-20th century, it was absorbed by the neighboring country of China.

Tibet is one of the major offenders regarding breaches of Clause 73 of the International Statute of Wizarding Secrecy, due to the presence of the Yeti. An International Task Force has been stationed there in order to deal with the numerous sightings of the creatures by Muggles.

Behind the scenes
In 1995, Harry Potter asked Neville Longbottom if there was some sort of Tibetan Turnip that would allow him to breathe underwater for an hour, in order to compete in the Second Task of the Triwizard Tournament. As he was being somewhat facetious, it is unlikely any such magical plant actually exists.