Just 5 miles from Cardiff, this teeny little island feels more remote than it really is, and is packed with both history and wildlife. You can easily get there by boat from the Barrage South Water Bus Stop in Penarth Marina (previously, before July 2010, passengers departed from Channel View Leisure Centre - but this is no longer the case). A short day trip to the island (available from March to October) gives you three hours there, which is just about enough - you can fit in a self guided tour (using a pack provided) to discover the island's historic buildings and wildlife, then enjoy a snack at the café before returning to Penarth Marina.
Although the island is very small, it has had many uses over the centuries. It was once a retreat for monks in the Dark Ages, and has become a sanctuary for Vikings, Anglo Saxons, silver miners and smugglers over the years. In the late 19th century it was even used as an isolation hospital for cholera sufferers to protect the mainland against the epidemic. It's most famous, however, because the world's first radio transmission across water was made from Flat Holm to Lavernock Point on 13 May 1897.
Nowadays, the island is a peaceful place inhabited by all sorts of wildlife, including seabird colonies such as Shelduck, Oystercatchers, Rock Pipits, Finches, Turnstone and Dunlin, plus other wildlife such as slow worms, common lizards, butterflies and all sorts of plants. It makes for an enjoyable day trip, and the boat ride itself is fun. read more