Around 12 million people visit Wales' national parks each year, spending more than £1billion, according to a new report being launched today.
The 'Valuing Wales' National Parks' report looks at the extent to which the Snowdonia, Brecon Beacons and Pembrokeshire Coast national parks impact upon the Welsh economy and the lives of people in Wales.
Commissioned by National Parks Wales, the Welsh Local Government Association and Natural Resources Wales, the report will be officially launched at the Pierhead Building in Cardiff Bay later today.
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A group of ex-servicemen have become the first people to climb Pen y Fan in the Brecon Beacons for 24 hours non-stop.
Thousands of athletes are in Tenby for the competition which consists of a two mile swim, a 112 mile cycle ride and a marathon.