The largest natural harbour in the United Kingdom. It is the estuary of 4 rivers, the largest being the Frome. It has an approximate area of 36km2 (14 sq mi) and it is very shallow (average depth is 48cm) . The area has a long history of human settlement pre-Roman times. The harbour was used by the Romans as an invasion port.
Poole is the main town. It became a wealthy city in the 17th century as it was a trading hub, and by the 18th century it was the main British port trading with North America.
The harbour is an area of international importance for wildlife conservation, and borders three natural reserves.
Poole Harbour has a special charm, and is well known for the most beautiful sunsets in Dorset. This post is about a face little known, Poole Harbour under the starry nights