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Parc Cefn Onn

Major improvements to Parc Cefn Onn

The Heritage Lottery Fund has awarded a grant of £459,000 to enable the first stage of improvements to the park that are expected to take around four months. The work will start on Monday February 4 2019.

View the Parc Cefn Onn master plan (7MB PDF)​​​​Link opens in a new window

Read about the Parc Cefn Onn Improvement Project​​​​​​​External link opens in a new window
This grade 2 listed country park is situated on the northern fringes of Cardiff. It contains a truly magnificent collection of native and exotic trees set within an intimate valley. Visitors enjoy the stunning scenery and the calm, relaxing atmosphere.

The park was originally designed some 90 years ago taking advantage of the gentle valley containing the Nant Fawr stream. 

The streams, ponds, woodlands and other planting make this a rich haven for wildlife. Visitors regularly return to enjoy the park in different seasons. 


  • Woodland garden in the southern part of the site
  • The Dingle is the historic heart of the park and contains a collection of rare and exotic plants
  • Coed Transh yr Hebog is a semi natural Oak and Beech woodland lying north of the more formal parkland near the top of Caerphilly mountain.
  • Mural artwork in the subway at the entrance to the park which tells the story of the park




Opening hours

7.30am - 30 minutes before sunset. 

How to find us

Access point


Main entrance


Southern entrance to the Dingle


Picnic Field


Coed Transh yr Hebog (footpath access from south east)


Ridgeway path



Public transport: See Cardiff bus​​​​​​​​​​​​​​​​​​​​External link opens in a new window  for local routes or visit TravelineCymru​​​​​​​​​​​​​​External link opens in a new window  to plan your journey online

Parking: Available on site.