Local tours now offer visitors the chance to dress up as the Witch-king of Angmar or the wizard Gandalf, and run around in the sea of grass waving replica swords.

BBC: A return to Middle-earth

The exhibition - Dartmoor Water and Light- also marks the release of Mark's first CD album, Sea of Grass, which features 12 tracks of multi-instrumental music inspired by the moor.

BBC: Devon - The creative pull of Dartmoor

The anchorchain arcs down into it, through shafts of sunlight, to where the sand is patched with sea-grass.

BBC: Sailing in Croatia

Conservationists would also like to see Turkey adopting the idea of marine protection areas to care for underwater habitats such as the important Posidonia sea grass meadows, as well as its sealife and sunken ruins.

BBC: Med threat from 'concrete coasts'

When warmer and wetter conditions returned, the birds became isolated in several islands of grass in a sea of forest.

WSJ: Matt Ridley on the Possible Formation of a Species | Mind & Matter