Hello anonymous,
No, it won't have been made by the same people but it will have been made around the same time. That style of stone structure is called a Dolmen or Portal Tomb and there are a lot of them in lots of countries around the world.
Have a look on this link to see some more http://www.megalithic.co.uk/search.php?query=&topic=&author=&sitetype=1050034311&county=&category=&type=stories
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