Eddie Butler and Heledd Fychan find out if the Gwent Levels flood of 1607 was a tsunami, and if the chain bridge at Llangollen is the oldest of its kind in the world.

Eddie learns to play handball at Nelson's unique handball court - the only one in the UK. Does the Norman town of Grosmont have the oldest church roof in Wales?

The remarkable story of a 19th-century cursing well, the secrets of a showcase mine, rock art on Anglesey as it's never been seen before, and visiting Brynmawr Welfare Park to discover how it was built by volunteers from Europe.

A look at the decommissioning of the Trawsfynydd nuclear power station, the lost settlements of Skomer Island and the search for the wreck of a Bristol Channel pilot cutter.