This large estate on the edge of Llandeilo is great for a day out. There is Dinefwr castle which was built in 877, it is now managed by CADW and owned by the local Wildlife Trust. Adjacent is the 18th century Newton House; Capability Brown landscaped this lovely estate, so it is worth going for those wonderful vistas alone, but as an added bonus the mediaeval deer park is a pleasure to walk around, with boardwalks and interesting veteran trees. 

Wildlife Trust of South and West Wales manage the ancient and untouched woodland alongside parkland to make for a beautiful nature reserve, easily accessed from either Dinefwr Parc or Llandeilo. Full of bluebells and wild garlic in spring and inhabited by many birds and mammals.

The National Trust runs a cafe from Newton House which offers plenty of outdoor seating. There are often events happening so well worth checking out before your visit.