Llanwrtyd Wells is the smallest town in Britain. It sits in the green heart of the Cambrian Mountains. My top tip is the Irfon River. You can walk the paths by the water for free. This is a prime choice for a low cost day in the fresh air. The town has a deep past as a spa. You can see the old pump rooms at Ffynnon Rhad. It is world famous for the Bog Snorkelling event in the peat. You can walk the quiet lanes to see the stone shops. The air is fresh and the hills are green. Many trails are dogs welcome spots. It is a smart spot for a trip. Life is quiet and the views are clear.