John: Hi there, this is BBC Learning English. We're out On the Town again and today we're talking about lidos. Feifei: Lidos? What's a lido? John: It's a very special kind of open-air swimming pool. John: OK, let's hear from some people who have been to a lido. Listen to Amber, she goes to the lido at Parliament Hill in north London, she's a regular swimmer there. It's part of a large park in north London. Here's her explanation of what a lido is. I think a lido is an outdoor swimming pool, usually huge and they are something that belonged to the past, perhaps the 1940s and 50s, I think of them, or 20s and 30s even