Durdle Door is probably the most famous stone arch anywhere in the world. It was created when the sea pierced through the Portland limestone around 10,000 years ago. Looking west over the beach, isolated stacks out at sea show where an older coastline once lay. This part of the coast is formed from merged bays and shows how Lulworth Cove and Stair Hole may look in several thousand years time.
By following the natural cliff path down to Durdle Door beach, or the steps to Man O’War beach, the tilted Purbeck Beds are clearly visible. At the base of the chalk cliffs a number of caves can be seen which have been carved out by the sea (wave cut notches)
