United Kingdom

The fortress on Castle Rock above Edinburgh, a royal castle since the 11th century and the dominant landmark of the Scottish capital.

A coastal expanse of around 40,000 interlocking basalt columns on the north coast of County Antrim, formed by an ancient volcanic eruption.

A remarkably preserved Roman bathing complex fed by a hot spring in the city of Bath, wrapped in later Georgian architecture.

A prehistoric ring of standing stones on Salisbury Plain in Wiltshire, one of the most famous megalithic monuments in the world.

The Victorian bascule and suspension bridge over the Thames beside the Tower of London, one of the most recognisable structures in London.

The largest inhabited castle in the world and a working royal residence at Windsor, founded in the 11th century after the Norman Conquest.