(Click photos to enlarge).
Durdle Dor - or Durdle Door which might seem to be the more logical spelling - is a natural limestone arch on Dorset's Jurassic coast located between Lulworth to the east and Weymouth to the west.
The photo below is taken from the east and shows the Man O'War beach on the other side from the limestone arch, and you can also see quite nicely how the bands of rock continue straight through the main structure.
Note Portland on the horizon in this and the first picture.
See also: Durdle Door on Wikipedia
Visited: 9 March 2009