If you have 6 hours or a half day to spend in Carmarthenshire, here are some suggestions:
1. Visit the medieval castle ruins of Carreg Cennen. It will take around 1-2 hours to explore the castle and stunning views.
2. Take a stroll along the Laugharne estuary and visit the boathouse where Dylan Thomas lived. This will take approximately 1-2 hours depending on how much time you spend in the boathouse.
3. Explore the National Botanic Garden of Wales. It's a beautiful place where you can see rare plants and flowers. It will take around 2-3 hours to explore the garden.
4. Go on a hike in the Brecon Beacons National Park, which is a short drive from Carmarthenshire. You can enjoy the stunning scenery and breathe in some fresh air. A hike can take around 2-3 hours depending on the route you choose.
5. Visit the Pendine Sands, which is a famous beach for land speed attempts. You can take a stroll along the beach and visit the museum. This will take around 1-2 hours.
Whatever you choose to do, make sure you take some time to enjoy the beautiful Welsh countryside and hospitality.