‘Out of evil cometh good’, and out of a disaster one wild October night on Anglesey came an invention that may have saved more lives than any other. It’s a story best told on a fascinating walk on the island’s east coast.

Andrew Galloway walks a linear route that’s a microcosm of Wales’ best bits

■ Distance: 11½ miles/18.2km ■ Time: 7 hours ■ Grade: Challenging

■ Distance: 8¾ miles/14.2km ■ Time: 4 hours ■ Grade: Moderate

A little light mountain camping makes this 3-dayer in Snowdonia the perfect long weekend route.

■ Distance: 7 miles/11km ■ Time: 4 hours ■ Grade: Moderate