Searching all stock for "silhouette":
SE.SuperviewS > Creative views: what is it? > Patterns (1 file)
Natural and man made patterns
SE.SuperviewS > Flowers, trees and plants > Trees and branch silhouettes (open collection)
Trees and branch silhouettes in the UK, France, Hawaii and other countries around the world
SE.SuperviewS > Landscapes and Travel > Costa Rica (1 file)
Various views & scenes in Costa Rica
SE.SuperviewS > Landscapes and Travel > Sunsets (1 file)
Sunsets shot in the UK, Bali, Croatia and Greece
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