Gregynog Hall

While Gregynog Hall has been here in some form for 800 years, its current mock-Tudor manifestation – notable as one of the first uses of concrete in modern construction – dates to 1840. It's now the 300-hectare Grade 1–listed garden, dating to at least the 16th century, that's the major attraction. Walking tracks trace avenues of sculpted yews, banks of rhododendrons and azaleas, 300-year-old oaks and bird-filled beech woodlands. Admission to the grounds is unrestricted; parking costs £2.50.