going to. we don't have. the space the used. this week our global ideas series takes us to south america. there are reporter tanya bluett set out to discover more about a unique aquatic landscape caused by flooding in northern colombia during the rainy season it's now in need of protection and locals are doing what they can to preserve it. thanks from above it looks like a lake but in fact it's a wetland system known as a sienna. the landscape is actually hilly but during the rainy season overflowing rivers form freshwater meadows transforming it into a swamp. it's