The focal point was the 33m high round tower, where the monks could hide away, keen to keep their precious manuscripts from the hands of invading Vikings.

The Glendalough Valley is now part of the Wicklow Mountains National Park. It was established in 1991, and now extends to more than 170sq kms. Only an hour’s drive from Dublin City, there is a vast array of routes for all levels of abilities. But Glendalough is best explored on the Spinc and Glenealo Valley Route, a high quality loop walk with wonderful waymarking and a well maintained trail.

Back at the visitor centre there are refreshments available in the restaurant, or you might want to head for the nearby village of Laragh with its restaurants and pubs. Laragh also makes a great base for further exploration of the surrounding mountains. Experienced walkers may want to climb Lugnaquilla, the highest mountain in Wicklow, while those in pursuit of more leisurely walks can explore historic Glenmalure or the scenic area around Lough Dan.

Slightly further north is the village of Roundwood, with its thriving Sunday market. Further north still the beautiful formal gardens of the Powerscourt Estate lie in the shadow of Sugarloaf Mountain. Do not miss a visit to Powerscourt Waterfall close by, at 130m the highest waterfall in Ireland or Britain. The cascade is impressive at any time of year, but it is especially dramatic after rain.