One historic monument has been lost every day since the end of World War Two.
There are 17,000 historic buildings and monuments in the UK at risk.
On an average weekend, more people visit historic buildings in the UK than go to football matches.
This summer BBC2 will be travelling all over the UK looking at our architectural heritage. Each programme in the series will feature three buildings from one geographical area.
Viewers will then be asked to vote to help save one of our thirty most endangered buildings.