Cold Knap is a coastal pebble beach, approximately a mile west of the sandy beach at Barry Island, which attracts visitors during the summer months. It was founded by the Romans who used it as a port.
Attractions include a lake shaped like a Welsh harp and a skate park. There was previously an outdoor swimming pool, but this has now been closed and filled in, and the area turned into a tourist trail. There was a campaign to have the lido rebuilt during 2014 but an enthusiastic online campaign (including a Facebook campaign group ("Rebuild the Knap Lido")) has not been successful, despite a number of celebrity endorsements (including local BBC weatherman Derek Brockway).