These are five of the best things to do in Penarth according to TripAdvisor SUMMER is coming, restrictions are easing, and many people are hoping to have some fun in the sun. Penarth is known for its iconic pier, its gardens, and – of course – that it has some of the best views in south Wales. These are the top five things to do outside in Penarth, according to TripAdvisor at the time of publication. The popularity ranking of all the places is based on ‘the quality, recency and quantity of reviews that a business receives from users — and the consistency of those reviews over time.’