From a boat out to Bardsey off the tip of the Llŷn Peninsula to the river and bay waterbus in the heart of Cardiff.
Wales has two crossings on this site, and they sit at opposite ends of the country and of the scale. Off the tip of the Llŷn Peninsula, the day trips out of Porth Meudwy to Enlli run to no clock at all: a twelve-seat catamaran goes out from a National Trust cove by Aberdaron when the weather is good enough, you book by ringing the boatman, and on the morning a traffic-light colour on the operator's website says whether your trip is on. The island belongs to a charity, the Bardsey Island Trust, which since 2026 takes its own £7.50 landing fee at the Cafn, apart from whatever the boat costs.
In the capital the timetable is the whole point. Cardiff's Aquabus is a 24-seat waterbus on the Taff, departing hourly from the Bute Park stage beside the Castle and at half past from Mermaid Quay, on every day of the year that weather and river allow; each run takes 25 to 30 minutes. It is priced as transport rather than a tour, £9 for an adult single, and bikes, dogs and pushchairs ride free. Where Enlli asks you to phone and wait for the weather, Cardiff asks only that you turn up ten minutes early.