Many of the world's cities are low lying and threatened by flooding. Bangkok, in Thailand, and Venice, in Italy are typical old cities built by water because they relied on shippping. Both cities are built on mud and are gradually sinking which increases the risk of flooding. Sea levels around the world are predicted to rise during this century with the possibility of devastating flooding in places. Many cities in the Netherlands are below or at sea level. They are always in danger of flooding although elaborate defences help to protect them. Bangkok, Thailand Venice, Italy

Ganvie (meaning: 'the collectivity of those who found peace at last') is a lake village in Benin, lying in Lake Nokoué, near Cotonou. The village has a population of around 20-30,000, contains around 3,000 stilted buildings and is probably the largest lake village in Africa.more photos, videos and text in A Welsh View

Just got back from Venice. It was a great week, we saw a lot of cool stuff. Architectural bienalle impressed me a lot, they have done amaizing job, This new houses for New Orleans, beautiful, really stunning to see what Katrina did and what will peaople build after. So sad to see all this ruined houses and people who lost everything. It's such a relief that things taken care of in a very nice way.