Ride from (a candidate for) Britain's smallest church - St Trillo's in Rhos, on the north Welsh coast - to the biggest: Liverpool Cathedral. Follows NCN5 all along the promenade, flat and traffic-free, to Rhyl, then NCN84 to St Asaph (Britain's second-smallest city, with a compact cathedral of its own). Back lanes over gentle hills to Holywell (site of St Winifrede's Well, the 'Lourdes of Wales') and then NCN5 using mainly traffic-free flat paths again to Chester, with its own majestic cathedral, for an overnight stop. Another, different, flat car-free tarmac path out to do a loop of the Wirral peninsula's seaside paths (with some stretches of potentially bumpy and muddy railtrails up to West Kirby). The final few miles from West Kirby are lovely promenade riding to New Brighton and then Birkenhead's ferry terminal, from where you can take your bike on the sightseeing boat across to Liverpool's famous docks area. The enormous Cathedral is a short ride away.

Blog, photos, more info: https://e2e.bike/other/route-research/smallest-church-to-biggest-1-rhos-to-chester/