Powis Castle Gardens, located in Welshpool, Wales is located on the grounds of the residence of the Earl of Powis. The castle itself was founded in the early 13th century by Welsh princes. The fomal, baroque gardens were designed in the 1670s.
Vistitors will see Italian style terraces, statues, an orangery, and even an aviary. Each terrace has a different theme. One has a Mediterranean theme. Another is planted with rhododendrons and ferns. Another has herbs. There is also a lower formal garden that has unusual pyramid-shaped apple trees, roses, delphiniums, phlox, and hollyhocks.
The gardens are beautiful year-round, but I think the best time to visit is in the spring when the tulips, hyacinths, and rhododendrons are in bloom. The gardens are open daily April to September from 12:00 PM to 5:00 PM, and March, October-December from 12:00 PM to 4:00 PM.