Leeward coast: coast sheltered from the waves.

UNESCO: L O S S A R Y

London, England (CNN) -- Nestled in a sheltered bay on the English Channel coast, Weymouth is one of Britain's most picturesque seaside towns.

CNN: Weymouth: Olympic sailing on Jurassic Coast

The oil, which affected 1, 300 miles of rugged coast, penetrated deep into the cobble beaches, especially in the areas sheltered from the winter storms that can help clean the beaches.

BBC: Oil spills: What is the long-term damage?