How important historical places are being protected

National parks are some of the most beautiful bits of the UK.

But archaeologists are a bit worried about the amount of vandalism that's happening in some of them.

In Wales, they've decided to employ wardens and park rangers to regularly patrol the sites to make sure they're kept safe.

Tomos Jones is an archaeologist for the Pembrokeshire Coast National park, he said the types of crimes on the parks are varied.

He said: "There are regular problems with fires on what are remote sites in the Preseli Hills, where we now know stones for Stonehenge were cut.

"There have been cases of people chipping away the remaining bluestones and damaging cairns."

Some of the monuments in the parks have even been sold online.

A heritage watch scheme was launched two years ago and it has been extended across Wales.

Police and park rangers will regularly patrol sites which might be at risk of vandalism.

Which means our national parks should be better protected, for longer!