For an architectural trip into the Middle Ages, make a beeline for delightful Rochefort-en-Terre. It's a photogenic town of narrow, cobbled streets and lovely squares lined with grand, granite mansions, slate-roofed houses and flower-filled window boxes – not to mention a smattering of art galleries and the mandatory crêperies that fill these parts.
Its picture-book perch on a rocky outcrop above the River Gueuzon is equally enchanting, though it can be packed in summer. As befits any medieval Breton town, it also boasts a lovely castle, which is sadly not open to the public, but is home to the eccentric sci-fi/fantasy Naia Museum in one of its out-buildings. The town's superb church was originally built in the 10th century.