Dorset rowing, sea kayaking and powerboating. Dorset has a varied landscape featuring broad elevated chalk downs, steep limestone ridges and low-lying clay valleys. Over half the county is designated as an Area of Outstanding Natural Beauty. Three-quarters of its coastline is part of the Jurassic Coast Natural World Heritage Site due to its geological and palaeontologic significance. It features notable landforms such as Lulworth Cove, the Isle of Portland, Chesil Beach and Durdle Door. Agriculture was traditionally the major industry of Dorset but is now in decline and tourism has become increasingly important to the economy. There are no motorways in
UNESCO Convention on the Protection of the Underwater Cultural Heritage sites have now disappeared without any trace. Due to the sheer mass of the world's oceans and the inability to monitor all activity that takes place therein, pirates and underwater thieves continue to pose a significant threat to the preservation of cultural heritage and cultural property. In 2006, the UNESCO convention was ratified by an additional state, Portugal, needing international protection for the looting of its underwater cultural heritage sites. At least six international treasure hunting organizations had established themselves off the coasts of Portugal to reap the benefits of the nation's coastline after new legislation had allowed for the