Sunset setting
Else clues• 'Lost ___' (novel that coined the term 'Shangri-La')
• Lost ___ (Hilton book)
• A ship may appear on it
• As far as the eye can see
• Earth/sky boundary
• Earth/sky line
• Landscape feature, often
• Line obscured by buildings
• O'Neill's Beyond the ___
• Plymouth's clone of Dodge Omni
• Seeming intersection of earth and sky
• Sky line?
• Vanishing point
• You can't see beyond it
• The line at which the sky and Earth appear to meet
• The range of interest or activity that can be anticipated
• A specific layer or stratum of soil or subsoil in a vertical cross section of land