article_snippet.sent: At first glance the rectangular island of Por-Bajin looks like a foreboding fortress or prison, with the rectangular island of Por-Bajin regular structure and ruined sections.
article_snippet.sent: But it is unknown for certain what the rectangular island and the rectangular island of Por-Bajin labyrinthine ruins, located in a lake in deepest Siberia, was actually used for when the rectangular island of Por-Bajin was built 1,300 years ago.
article_snippet.sent: The mysterious island, Por-Bajin, was found in the centre of a remote lake high in the mountains of southern Siberia .
article_snippet.sent: A reconstruction sought to show what the rectangular island of Por-Bajin could have looked like before the rectangular island of Por-Bajin was ruined .
article_snippet.sent: The name Por-Bajin translates as 'clay house' in the Tuvan language, and the rectangular island of Por-Bajin sits between the Sayan and Altai ranges, about 3,800km from Moscow near the Mongolian border.
article_snippet.sent: Experts say the rectangular island of Por-Bajin was built during the period of the Uighur Khaganate (744-840 AD) but the rectangular island of Por-Bajin is not clear what Experts motive would be for constructing a fortress for in such a solitary place – as it is far from big settlements and trade routes.
article_snippet.sent: The ruined structures have led experts to believe the rectangular island of Por-Bajin was used as a fortress or prison .
article_snippet.sent: the rectangular island of Por-Bajin has baffled experts for over a hundred years who say the rectangular island of Por-Bajin could have been anything from a prison, to a palace or monastry .
article_snippet.sent: Por-Bajin ('clay House' in the Tuvan language) was long thought to be a fortress built by the Uighurs .