Portland, England: The Jurassic Coast Peninsula That Built St. Paul's Cathedral

Portland Bill, the headland at the peninsula's southern tip, has a lighthouse that has warned ships away from the dangerous tidal races since 1716; the current structure dates from 1905 and is open for tours. The tidal conditions around the Bill are among the most complex in the English Channel — a 5-knot race runs south off the headland on each tide — and the sea off the point on a rough day is noticeably disturbed even from the shore. The walk south from the bill along the western coast passes through old quarry workings and gives views of the Portland Race and, on clear days, the Jurassic Coast cliffs stretching east toward Lyme Regis. The Pulpit Rock, a free-standing limestone stack at the Bill, is accessible on foot and is a popular climbing spot.

Chesil Beach, connecting Portland to the mainland at Abbotsbury, is one of the only tombolo formations of its scale in Europe: 29 kilometres of storm beach, 200 metres wide at some points, with a pebble gradient that shifts from pea-sized at the Abbotsbury end to fist-sized at Portland — a gradient so consistent that local fishermen could determine their location in fog by the pebble size alone. The Fleet Lagoon behind the beach is a brackish tidal lagoon protected from the open sea; it is the main nesting colony for the resident population of mute swans at Abbotsbury Swannery, which has been maintained since the eleventh century. The beach is accessible from Portland via the B3157, and the 10-kilometre walk along the crest from Chesil Cove at Portland to Ferrybridge is one of the most disorienting walks in England — sea on both sides, with no visible horizon beyond the pebble ridge.

The Jurassic Coast, the UNESCO World Heritage Site running 155 kilometres from Exmouth in Devon to Studland in Dorset, is accessible in its most dramatic section from Portland. The cliffs at Durdle Door, 20 kilometres east of Portland, contain a natural limestone arch cut through a headland by wave action; the beach below is one of the most photographed in England and accessible via a steep path from the car park at the top. Lulworth Cove, immediately east of Durdle Door, is a near-circular bay formed by differential erosion of the rock layers — harder Portland stone on the outside, softer chalk and limestone behind — and the geological story of the entire Jurassic Coast is visible in miniature in the cove's walls. The Fossil Forest, east of Lulworth, preserves the bases of 135-million-year-old trees in limestone.

The quarrying history of Portland is visible across the plateau in worked faces, abandoned blocks, and the shallow rubble fields between active quarries. The Tout Quarry Sculpture Park, on the western side of the plateau, is a decommissioned quarry where sculptors have worked directly into the stone faces since 1983; around 70 works are embedded in the quarry walls in various states of weathering. The Portland Museum in Fortuneswell, housed in a seventeenth-century thatched cottage, covers the island's geological and social history, including the 1805 departure of convict ships from Portland Roads and the history of Portland stone as a building material. Thomas Hardy, who set several novels in this area (Portland appears as 'The Isle of Slingers' in The Well-Beloved), is well-documented in the local collections.