Bontnewydd Palaeolithic Site is a really old place where people used to live a long, long time ago! It's full of clues and artifacts that help us understand how those people lived, even though they lived so long ago.
The site is in Wales, which is a country in Europe. It's special because it's one of the oldest places that humans have lived in that area! Scientists have found lots of things at the site, like tools made out of stone and animal bones that have been cut and shaped by human hands. They think that these tools were used for things like scraping hides or cutting meat.
The site is also special because it's a cave. So the people who lived there were able to be protected from the weather and the animals outside. They could build fires inside the cave for warmth and light, and cook their food too.
Scientists study the things they find at the site to learn more about these people and how they lived. They can tell things like what they ate, how they made their tools, and even how they got along with each other! It's like a big puzzle, and the clues from the site help scientists put it together.