Finding peace in Greece: Halkidiki is known for its lively bars and sprawling resorts. But head to a nearby peninsula for unspoiled villages, cobalt seas – and King Charles’s spiritual retreat

It takes three loops down the same winding lane, as well as some choice words with the satnav, before we finally spot the discreet sign for our hotel.Easing the hire car down another twisting path, it suddenly – thrillingly – reveals itself in a scattering of boxy...